All Transactions
Transactions listed are from November 1 of previous year to April 1 of the following year.
- November 1, 1986
The Los Angeles Dodgers released Joe Beckwith.
The San Diego Padres released Bob Stoddard.
The Montreal Expos released Jim Wohlford.
- November 2, 1986
Gary Roenicke of the New York Yankees granted free agency.
- November 7, 1986
The Cleveland Indians released Fran Mullins.
The Pittsburgh Pirates released U L Washington.
- November 10, 1986
Doug Bair of the Oakland Athletics granted free agency.
Dusty Baker of the Oakland Athletics granted free agency.
Bruce Bochte of the Oakland Athletics granted free agency.
The San Francisco Giants released Rick Lancellotti.
The San Francisco Giants released Bill Laskey.
The San Francisco Giants released Luis Quiñones.
- November 11, 1986
The Cincinnati Reds released Pete Rose.
The Cincinnati Reds released Dave Van Gorder.
The Cincinnati Reds released Chris Welsh.
- November 12, 1986
Doyle Alexander of the Atlanta Braves granted free agency.
Larry Andersen of the Houston Astros granted free agency.
Tony Armas of the Boston Red Sox granted free agency.
Alan Ashby of the Houston Astros granted free agency.
Jim Beattie of the Seattle Mariners granted free agency.
Vida Blue of the San Francisco Giants granted free agency.
Bob Boone of the California Angels granted free agency.
Rick Burleson of the California Angels granted free agency.
Enos Cabell of the Los Angeles Dodgers granted free agency.
Steve Carlton of the Chicago White Sox granted free agency.
Rick Cerone of the Milwaukee Brewers granted free agency.
Chris Chambliss of the Atlanta Braves granted free agency.
Jim Clancy of the Toronto Blue Jays granted free agency.
Dave Concepción of the Cincinnati Reds granted free agency.
Doug Corbett of the California Angels granted free agency.
Andre Dawson of the Montreal Expos granted free agency.
Doug DeCinces of the California Angels granted free agency.
Rick Dempsey of the Baltimore Orioles granted free agency.
John Denny of the Cincinnati Reds granted free agency.
Brian Downing of the California Angels granted free agency.
Jim Dwyer of the Baltimore Orioles granted free agency.
Mike Fischlin of the New York Yankees granted free agency.
Bob Forsch of the St. Louis Cardinals granted free agency.
Terry Forster of the California Angels granted free agency.
Phil Garner of the Houston Astros granted free agency.
Rich Gedman of the Boston Red Sox granted free agency.
Ron Guidry of the New York Yankees granted free agency.
Toby Harrah of the Texas Rangers granted free agency.
Danny Heep of the New York Mets granted free agency.
Glenn Hoffman of the Boston Red Sox granted free agency.
Bob Horner of the Atlanta Braves granted free agency.
Tom Hume of the Philadelphia Phillies granted free agency.
Clint Hurdle of the St. Louis Cardinals granted free agency.
Reggie Jackson of the California Angels granted free agency.
Roy Lee Jackson of the Minnesota Twins granted free agency.
Cliff Johnson of the Toronto Blue Jays granted free agency.
Tommy John of the New York Yankees granted free agency.
Lynn Jones of the Kansas City Royals granted free agency.
Dave Kingman of the Oakland Athletics granted free agency.
Ray Knight of the New York Mets granted free agency.
Wayne Krenchicki of the Montreal Expos granted free agency.
Mike LaCoss of the San Francisco Giants granted free agency.
Rudy Law of the Kansas City Royals granted free agency.
Charlie Lea of the Montreal Expos granted free agency.
Davey Lopes of the Houston Astros granted free agency.
Buck Martinez of the Toronto Blue Jays granted free agency.
Dennis Martínez of the Montreal Expos granted free agency.
Charlie Moore of the Milwaukee Brewers granted free agency.
Jack Morris of the Detroit Tigers granted free agency.
Randy Niemann of the New York Mets granted free agency.
Dickie Noles of the Cleveland Indians granted free agency.
Ben Oglivie of the Milwaukee Brewers granted free agency.
Bob Owchinko of the Montreal Expos granted free agency.
David Palmer of the Atlanta Braves granted free agency.
Lance Parrish of the Detroit Tigers granted free agency.
Frank Pastore of the Minnesota Twins granted free agency.
Darrell Porter of the Texas Rangers granted free agency.
Joe Price of the Cincinnati Reds granted free agency.
Jamie Quirk of the Kansas City Royals granted free agency.
Tim Raines of the Montreal Expos granted free agency.
Willie Randolph of the New York Yankees granted free agency.
Jerry Royster of the San Diego Padres granted free agency.
Vern Ruhle of the California Angels granted free agency.
Lenn Sakata of the Oakland Athletics granted free agency.
Joe Sambito of the Boston Red Sox granted free agency.
Billy Sample of the Atlanta Braves granted free agency.
Tom Seaver of the Boston Red Sox granted free agency.
Lonnie Smith of the Kansas City Royals granted free agency.
Chris Speier of the Chicago Cubs granted free agency.
Harry Spilman of the San Francisco Giants granted free agency.
Dave Stapleton of the Boston Red Sox granted free agency.
Sammy Stewart of the Boston Red Sox granted free agency.
Gary Ward of the Texas Rangers granted free agency.
Claudell Washington of the New York Yankees granted free agency.
Ernie Whitt of the Toronto Blue Jays granted free agency.
Al Woods of the Minnesota Twins granted free agency.
Steve Yeager of the Seattle Mariners granted free agency.
The Baltimore Orioles released Juan Bonilla.
The Detroit Tigers released Larry Herndon.
The Pittsburgh Pirates released Ray Krawczyk.
The Philadelphia Phillies released Dave Rucker.
The Los Angeles Dodgers released Bill Russell.
The New York Mets traded Ron Gardenhire to the Minnesota Twins for a player to be named later. The Minnesota Twins sent Donnie Iasparro (minors) (April 4, 1987) to the New York Mets to complete the trade.
- November 13, 1986
The Montreal Expos signed Dave Collins as a free agent.
- November 14, 1986
The Chicago White Sox signed Pat Keedy as a free agent.
The Kansas City Royals signed Scotti Madison as a free agent.
- November 15, 1986
The Kansas City Royals signed Joe DeSa as a free agent.
The Kansas City Royals signed Jerry Don Gleaton as a free agent.
The Kansas City Royals signed Jamie Nelson as a free agent.
The Kansas City Royals signed Bill Swaggerty as a free agent.
The Atlanta Braves signed Ben Rivera as an amateur free agent.
- November 16, 1986
The Houston Astros purchased Rocky Childress from the Philadelphia Phillies.
- November 17, 1986
The Atlanta Braves signed Trench Davis as a free agent.
The Atlanta Braves signed Chuck Hensley as a free agent.
The Atlanta Braves signed Al Pardo as a free agent.
- November 20, 1986
The Baltimore Orioles signed Jim Dwyer as a free agent.
The New York Yankees signed Jeff Moronko as a free agent.
The Chicago White Sox released Vicente Palacios.
- November 22, 1986
Rod Scurry of the New York Yankees granted free agency.
- November 24, 1986
The New York Mets signed Bob Buchanan as a free agent.
The San Francisco Giants signed Keith Comstock as a free agent.
- November 26, 1986
The New York Yankees traded Doug Drabek, Logan Easley and Brian Fisher to the Pittsburgh Pirates for Pat Clements, Cecilio Guante and Rick Rhoden.
- November 28, 1986
The Cleveland Indians signed Casey Parsons as a free agent.
- December, 1986
The Milwaukee Brewers purchased Narciso Elvira from Leon (Mexican).
- December 1, 1986
The St. Louis Cardinals signed Duane Walker as a free agent.
The Cincinnati Reds traded Mike Smith to the Montreal Expos for Bill Cutshall (minors).
- December 3, 1986
The Baltimore Orioles signed Mike Hart as a free agent.
The Texas Rangers signed Alan Knicely as a free agent.
The Texas Rangers signed Tom O'Malley as a free agent.
The Texas Rangers signed Dave Rucker as a free agent.
- December 4, 1986
The Pittsburgh Pirates signed Butch Davis as a free agent.
The Pittsburgh Pirates signed Vicente Palacios as a free agent.
The Pittsburgh Pirates signed Mark Ross as a free agent.
- December 5, 1986
The Cincinnati Reds signed Dave Concepción as a free agent.
The Baltimore Orioles signed Mike Griffin as a free agent.
The Texas Rangers signed Darrell Porter as a free agent.
The Boston Red Sox signed Joe Sambito as a free agent.
The Los Angeles Dodgers signed Brad Wellman as a free agent.
The Pittsburgh Pirates traded Rick Renteria to the Seattle Mariners for a player to be named later. The Seattle Mariners sent Bob Siegel (minors) (December 10, 1986) to the Pittsburgh Pirates to complete the trade.
- December 6, 1986
The New York Yankees signed Rod Scurry as a free agent.
- December 7, 1986
The New York Yankees signed Claudell Washington as a free agent.
- December 8, 1986
The Seattle Mariners drafted Stan Clarke from the Toronto Blue Jays in the 1986 rule 5 draft.
The Texas Rangers drafted Cecil Espy from the Pittsburgh Pirates in the 1986 rule 5 draft.
The Chicago White Sox drafted Bob Gibson from the Milwaukee Brewers in the 1986 rule 5 draft.
The Toronto Blue Jays drafted José Núñez from the Kansas City Royals in the 1986 rule 5 draft.
The Milwaukee Brewers drafted Vicente Palacios from the Pittsburgh Pirates in the 1986 rule 5 draft.
The Atlanta Braves drafted Joe Redfield from the Baltimore Orioles in the 1986 rule 5 draft.
The Oakland Athletics drafted Cliff Young from the Toronto Blue Jays in the 1986 rule 5 draft.
The Detroit Tigers signed Larry Herndon as a free agent.
The Kansas City Royals signed Rudy Law as a free agent.
The Kansas City Royals signed Jamie Quirk as a free agent.
The Philadelphia Phillies released Jeff Bittiger.
The Oakland Athletics released Wayne Gross.
The Baltimore Orioles traded a player to be named later and Dennis Martínez to the Montreal Expos for a player to be named later. The Baltimore Orioles sent John Stefero (December 8, 1986) to the Montreal Expos to complete the trade. The Montreal Expos sent Rene Gonzales (December 16, 1986) to the Baltimore Orioles to complete the trade.
- December 9, 1986
The Cleveland Indians drafted Gibson Alba from the Toronto Blue Jays in the 1986 minor league draft.
The Texas Rangers drafted José Cecena from the Philadelphia Phillies in the 1986 minor league draft.
The Los Angeles Dodgers drafted Mike Hartley from the St. Louis Cardinals in the 1986 minor league draft.
The Seattle Mariners drafted Jeff Nelson from the Los Angeles Dodgers in the 1986 minor league draft.
The Los Angeles Dodgers drafted Jeff Schaefer from the California Angels in the 1986 minor league draft.
The Chicago Cubs drafted Heathcliff Slocumb from the New York Mets in the 1986 minor league draft.
The Texas Rangers signed Keith Creel as a free agent.
The San Francisco Giants signed Mike LaCoss as a free agent.
The Montreal Expos signed Mike Madden as a free agent.
The Texas Rangers signed Dave Meier as a free agent.
The Montreal Expos signed John Mizerock as a free agent.
The San Francisco Giants signed Harry Spilman as a free agent.
The San Diego Padres purchased Guillermo Velasquez from Monterrey (Mexican).
- December 10, 1986
The Pittsburgh Pirates signed Houston Jiménez as a free agent.
The Kansas City Royals traded Scott Bankhead, Mike Kingery and Steve Shields to the Seattle Mariners for Rick Luecken and Danny Tartabull.
The Los Angeles Dodgers traded Greg Brock to the Milwaukee Brewers for Tim Crews and Tim Leary.
The Los Angeles Dodgers traded Mike Watters (minors) and Dennis Powell to the Seattle Mariners for Matt Young.
- December 11, 1986
The New York Mets traded Kevin Armstrong (minors), Kevin Brown (minors), Shawn Abner, Stan Jefferson and Kevin Mitchell to the San Diego Padres for Adam Ging (minors), Kevin McReynolds and Gene Walter.
The New York Yankees traded Tommy Barrett and Mike Easler to the Philadelphia Phillies for Jeff Knox (minors) and Charles Hudson.
The Chicago White Sox traded a player to be named later and Gene Nelson to the Oakland Athletics for Donnie Hill. The Chicago White Sox sent Bruce Tanner (December 18, 1986) to the Oakland Athletics to complete the trade.
- December 12, 1986
The San Francisco Giants signed Chris Speier as a free agent.
- December 15, 1986
The Houston Astros signed Davey Lopes as a free agent.
- December 16, 1986
The Texas Rangers released Ricky Wright.
- December 17, 1986
The New York Yankees signed Lenn Sakata as a free agent.
The Philadelphia Phillies signed Jeff Grotewold as an amateur free agent.
The St. Louis Cardinals released Ken Dayley.
The Los Angeles Dodgers released Jack Fimple.
The Los Angeles Dodgers released Ed Vande Berg.
The Chicago Cubs traded Joe Hicks (minors) to the Oakland Athletics for Bill Bathe.
The Baltimore Orioles traded Juan Beníquez to the Kansas City Royals for Jimmy Daniel (minors) and Joe Jarrell (minors).
The New York Mets traded Doug Gwosdz to the Seattle Mariners for Ricky Nelson.
- December 18, 1986
The Texas Rangers signed Mike Jeffcoat as a free agent.
The Chicago White Sox signed Clemente Álvarez as an amateur free agent.
The Kansas City Royals released Mike Brewer.
The San Diego Padres released Dave LaPoint.
The San Diego Padres released Graig Nettles.
- December 19, 1986
The Houston Astros signed Alan Ashby as a free agent.
The St. Louis Cardinals signed Bob Forsch as a free agent.
The Detroit Tigers signed Jack Morris as a free agent.
The Atlanta Braves signed David Palmer as a free agent.
The San Francisco Giants released Juan Berenguer.
The Kansas City Royals released Buddy Biancalana.
The Minnesota Twins released Ray Fontenot.
The San Francisco Giants released Jim Gott.
The California Angels released Bobby Grich.
The San Francisco Giants released Atlee Hammaker.
The California Angels released Rufino Linares.
The Kansas City Royals released Hal McRae.
The Chicago White Sox released Luis Salazar.
The Baltimore Orioles released Nate Snell.
The Montreal Expos released George Wright.
The California Angels traded a player to be named later and Ron Romanick to the New York Yankees for Butch Wynegar. The California Angels sent Alan Mills (June 22, 1987) to the New York Yankees to complete the trade.
- December 20, 1986
The Atlanta Braves signed Jeff Bittiger as a free agent.
The Boston Red Sox signed Glenn Hoffman as a free agent.
The Minnesota Twins released Juan Agosto.
The Montreal Expos released Dann Bilardello.
The Detroit Tigers released Darrell Evans.
The Chicago White Sox released Jack Perconte.
The Chicago White Sox released Dave Schmidt.
The New York Yankees released Bob Shirley.
The Montreal Expos released Bryn Smith.
The Minnesota Twins released Roy Smith.
The Seattle Mariners released Roy Thomas.
The Pittsburgh Pirates released Lee Tunnell.
- December 21, 1986
The Houston Astros signed Larry Andersen as a free agent.
- December 22, 1986
The Oakland Athletics signed Carlos Diaz as a free agent.
The New York Yankees released Mike Armstrong.
The Kansas City Royals released Steve Balboni.
The Kansas City Royals released Alan Hargesheimer.
The Kansas City Royals released Dennis Leonard.
The Kansas City Royals released Jorge Orta.
The Chicago White Sox traded Bill Dawley to the St. Louis Cardinals for Fred Manrique.
- December 23, 1986
The Seattle Mariners signed Dave Stapleton as a free agent.
The Cleveland Indians released John Butcher.
The Milwaukee Brewers released Jaime Cocanower.
- December 24, 1986
The Oakland Athletics signed Reggie Jackson as a free agent.
The New York Yankees signed Gary Ward as a free agent.
The New York Yankees traded a player to be named later, Ron Hassey and Carlos Martínez to the Chicago White Sox for Ron Kittle, Joel Skinner and Wayne Tolleson. The New York Yankees sent Bill Lindsey (December 24, 1986) to the Chicago White Sox to complete the trade.
- December 26, 1986
The Philadelphia Phillies signed Tom Hume as a free agent.
- December 29, 1986
The Minnesota Twins signed Germán González as an amateur free agent.
- December 30, 1986
The Baltimore Orioles signed Dave Van Gorder as a free agent.
- Before 1987 Season
The New York Yankees signed Mike Armstrong as a free agent.
The Minnesota Twins signed John Butcher as a free agent.
The Cleveland Indians signed Kurt Kepshire as a free agent.
The Chicago Cubs signed Dan Rohn as a free agent.
The Cincinnati Reds signed Bill Scherrer as a free agent.
The Milwaukee Brewers signed Dave Schuler as a free agent.
The Montreal Expos signed Chris Welsh as a free agent.
The Montreal Expos signed George Wright as a free agent.
The New York Mets released Bruce Berenyi.
The Montreal Expos released John Mizerock.
Bobby Castillo sent from the Oakland Athletics to the Seattle Mariners in an unknown transaction.
Mike Fuentes sent from the Houston Astros to ??? in an unknown transaction.
Ron Musselman sent from the Toronto Blue Jays to ??? in an unknown transaction.
The Kansas City Royals signed Mike Fuentes as a free agent.
The Minnesota Twins signed Ron Musselman as a free agent.
- January 1, 1987
The Kansas City Royals signed Tom Gilles as a free agent.
- January 3, 1987
The Baltimore Orioles signed Ravelo Manzanillo as a free agent.
- January 5, 1987
The Chicago White Sox signed Ralph Citarella as a free agent.
The Chicago White Sox traded Pete Filson and Randy Velarde to the New York Yankees for Mike Soper (minors) and Scott Nielsen.
- January 6, 1987
The Toronto Blue Jays signed Jim Clancy as a free agent.
The Houston Astros signed Phil Garner as a free agent.
The California Angels signed Jack Lazorko as a free agent.
- January 7, 1987
The Baltimore Orioles signed Rick Burleson as a free agent.
The California Angels signed Jack Fimple as a free agent.
The Oakland Athletics released Joe Strong.
- January 8, 1987
The New York Yankees signed Juan Bonilla as a free agent.
The California Angels signed Doug DeCinces as a free agent.
The California Angels signed Brian Downing as a free agent.
The New York Yankees signed Tommy John as a free agent.
The New York Yankees signed Willie Randolph as a free agent.
The Toronto Blue Jays signed Ernie Whitt as a free agent.
The Cincinnati Reds traded Eddie Milner to the San Francisco Giants for Timber Mead (minors), Mike Villa (minors) and Frank Williams.
- January 9, 1987
The Minnesota Twins signed Juan Berenguer as a free agent.
The Pittsburgh Pirates signed Carlos García as an amateur free agent.
- January 10, 1987
The Texas Rangers signed Nick Capra as a free agent.
- January 12, 1987
The Kansas City Royals signed Buddy Biancalana as a free agent.
The Toronto Blue Jays signed Steve Fireovid as a free agent.
The Kansas City Royals signed Hal McRae as a free agent.
The Kansas City Royals signed Jorge Orta as a free agent.
- January 13, 1987
The San Diego Padres signed Tom Gorman as a free agent.
The Texas Rangers signed José Hernández as an amateur free agent.
- January 15, 1987
The Seattle Mariners signed Jim Weaver as a free agent.
- January 16, 1987
The Minnesota Twins signed Randy Niemann as a free agent.
- January 19, 1987
The California Angels signed Chris Cron as a free agent.
The St. Louis Cardinals signed Ken Dayley as a free agent.
The Montreal Expos signed Dave Engle as a free agent.
The Cleveland Indians signed Doug Frobel as a free agent.
The St. Louis Cardinals signed Dave LaPoint as a free agent.
The Houston Astros released Roger Samuels.
- January 20, 1987
The Oakland Athletics signed Vida Blue as a free agent.
The Pittsburgh Pirates signed U L Washington as a free agent.
The Atlanta Braves traded Brad Komminsk to the Milwaukee Brewers for Dion James.
- January 21, 1987
The Chicago White Sox signed Jerry Royster as a free agent.
- January 22, 1987
The Oakland Athletics signed Luis Quiñones as a free agent.
The Baltimore Orioles signed Dave Schmidt as a free agent.
The California Angels purchased Jim Eppard from the Oakland Athletics.
- January 23, 1987
The Montreal Expos signed Bruce Berenyi as a free agent.
The Atlanta Braves signed Gary Roenicke as a free agent.
- January 24, 1987
The Houston Astros signed Ron Mathis as a free agent.
- January 26, 1987
The St. Louis Cardinals signed Skeeter Barnes as a free agent.
The Cleveland Indians released Jim Wilson.
- January 27, 1987
The Cleveland Indians signed Ed Vande Berg as a free agent.
The Atlanta Braves traded Freddy Tiburcio (minors) and Terry Harper to the Detroit Tigers for Chuck Cary and Randy O'Neal.
- January 28, 1987
The New York Yankees signed Bob Shirley as a free agent.
The Milwaukee Brewers signed Dave Nilsson as an amateur free agent.
- January 30, 1987
The Baltimore Orioles signed Jack O'Connor as a free agent.
The Chicago Cubs traded Ron Cey to the Oakland Athletics for Luis Quiñones.
- February 2, 1987
The Detroit Tigers signed Nate Snell as a free agent.
The Atlanta Braves traded Craig McMurtry to the Toronto Blue Jays for Dámaso García and Luis Leal.
- February 3, 1987
The Minnesota Twins traded Al Cardwood (minors), Neal Heaton, Yorkis Pérez and Jeff Reed to the Montreal Expos for Tom Nieto and Jeff Reardon.
- February 4, 1987
The San Francisco Giants signed Atlee Hammaker as a free agent.
The Detroit Tigers signed Bill Laskey as a free agent.
The Detroit Tigers signed Mike Stenhouse as a free agent.
- February 5, 1987
The Cleveland Indians signed Dennis Lamp as a free agent.
The San Francisco Giants signed Joe Price as a free agent.
- February 6, 1987
The Cleveland Indians signed Rick Dempsey as a free agent.
The Oakland Athletics signed Johnnie LeMaster as a free agent.
The San Francisco Giants signed Roger Samuels as a free agent.
The Kansas City Royals signed Bob Stoddard as a free agent.
The Pittsburgh Pirates signed Lee Tunnell as a free agent.
- February 9, 1987
The Pittsburgh Pirates signed Onix Concepción as a free agent.
The New York Mets signed Clint Hurdle as a free agent.
- February 11, 1987
The Los Angeles Dodgers signed Jack Perconte as a free agent.
- February 12, 1987
The Baltimore Orioles signed Ray Knight as a free agent.
- February 13, 1987
The Houston Astros signed Juan Agosto as a free agent.
The New York Yankees signed Rick Cerone as a free agent.
The Kansas City Royals signed Matt Winters as a free agent.
The California Angels released Chris Green.
- February 14, 1987
The Milwaukee Brewers signed Paul Mirabella as a free agent.
- February 16, 1987
The Montreal Expos signed Charlie Lea as a free agent.
The Montreal Expos signed Pascual Pérez as a free agent.
The Baltimore Orioles signed Luis Mercedes as an amateur free agent.
- February 17, 1987
The Texas Rangers signed Ed Jurak as a free agent.
The Chicago Cubs traded Guy Hoffman to the Cincinnati Reds for Wade Rowdon.
- February 19, 1987
The San Francisco Giants signed Ray Fontenot as a free agent.
The California Angels signed Vern Ruhle as a free agent.
- February 20, 1987
The New York Mets signed Andre David as a free agent.
The St. Louis Cardinals signed Iván de Jesús as a free agent.
The Minnesota Twins traded Mike Shade (minors) to the Montreal Expos for Al Newman.
- February 22, 1987
The Atlanta Braves signed John Rabb as a free agent.
- February 23, 1987
The Cleveland Indians traded Curt Wardle to the Oakland Athletics for Jeff Kaiser.
- February 24, 1987
The Detroit Tigers signed Darrell Evans as a free agent.
The Minnesota Twins signed Billy Sample as a free agent.
The Minnesota Twins signed Roy Smith as a free agent.
- February 25, 1987
The Kansas City Royals signed Steve Balboni as a free agent.
- February 26, 1987
The Los Angeles Dodgers signed Jaime Cocanower as a free agent.
The Texas Rangers signed Frank Pastore as a free agent.
- February 27, 1987
The New York Mets signed Chris Green as a free agent.
The Montreal Expos signed Bryn Smith as a free agent.
- March 4, 1987
The Texas Rangers signed Steve Kemp as a free agent.
The Milwaukee Brewers signed Ángel Miranda as an amateur free agent.
- March 6, 1987
The Montreal Expos signed Bill Campbell as a free agent.
- March 9, 1987
The Chicago Cubs signed Andre Dawson as a free agent.
- March 11, 1987
The Chicago White Sox signed Kevin Hickey as a free agent.
The Montreal Expos released Bruce Berenyi.
- March 13, 1987
The Philadelphia Phillies signed Lance Parrish as a free agent.
- March 16, 1987
The Cincinnati Reds signed Rosario Rodríguez as an amateur free agent.
- March 17, 1987
The New York Yankees signed Rich Thompson as a free agent.
- March 18, 1987
The Cleveland Indians released Kevin Buckley.
The San Francisco Giants released Ray Fontenot.
- March 20, 1987
The California Angels signed Tack Wilson as a free agent.
The New York Yankees purchased Carlos Rodríguez from Mexico City Tigers (Mexican).
The Montreal Expos released Len Barker.
The Oakland Athletics released Rusty Tillman.
The Cincinnati Reds traded Derek Botelho to the Kansas City Royals for Pete Carey (minors) and Eddie Tanner (minors).
- March 21, 1987
The Montreal Expos released Chris Welsh.
- March 22, 1987
The San Francisco Giants purchased Francisco Meléndez from the Philadelphia Phillies.
The Oakland Athletics released Carlos Diaz.
The Montreal Expos signed Dann Bilardello as a free agent.
The Pittsburgh Pirates purchased Dann Bilardello from the Montreal Expos.
- March 23, 1987
The Cincinnati Reds signed Terry Francona as a free agent.
The Chicago White Sox released Julio Cruz.
The Detroit Tigers released Brian Harper.
The Cleveland Indians released Kurt Kepshire.
The Cleveland Indians released Dennis Lamp.
The Chicago Cubs released Mike Martin.
- March 24, 1987
The Detroit Tigers traded Dario Guzman (minors) to the Texas Rangers for Orlando Mercado.
- March 25, 1987
The Houston Astros signed Ray Fontenot as a free agent.
The Seattle Mariners released Bobby Castillo.
- March 26, 1987
The Toronto Blue Jays released Ron Shepherd.
The Chicago White Sox traded Joe Cowley and cash to the Philadelphia Phillies for Gary Redus.
- March 27, 1987
The Minnesota Twins released John Butcher.
The St. Louis Cardinals released Larry Carter.
The Baltimore Orioles released Odell Jones.
The Kansas City Royals released Rudy Law.
The New York Yankees released Rod Scurry.
The Chicago White Sox traded John Cangelosi to the Pittsburgh Pirates for Jim Winn.
The Kansas City Royals traded David Cone and Chris Jelic to the New York Mets for Rick Anderson, Mauro Gozzo and Ed Hearn.
- March 28, 1987
The Montreal Expos signed Ron Shepherd as a free agent.
- March 29, 1987
The Cincinnati Reds released Max Venable.
- March 30, 1987
The Baltimore Orioles released Rich Bordi.
The Chicago White Sox released Bob Gibson.
The Boston Red Sox released Tim Lollar.
The Chicago White Sox released Reid Nichols.
The Kansas City Royals released Greg Pryor.
The Minnesota Twins released Ron Washington.
The Chicago Cubs traded Thad Bosley and Dave Gumpert to the Kansas City Royals for Jim Sundberg.
- March 31, 1987
The Kansas City Royals signed Larry Owen as a free agent.
The Pittsburgh Pirates released Mike Brown.
The Montreal Expos released Dave Collins.
The Minnesota Twins released Mickey Hatcher.
The Seattle Mariners released Pete Ladd.
The Seattle Mariners released Dave Stapleton.
The Minnesota Twins traded a player to be named later, Jose Dominguez (minors) and Ray Velasquez (minors) to the San Francisco Giants for Dave Blakley (minors) and Dan Gladden. The Minnesota Twins sent Bryan Hickerson (June 15, 1987) to the San Francisco Giants to complete the trade.
- April, 1987
The New York Mets released Chris Green.
- April 1, 1987
The Atlanta Braves signed Graig Nettles as a free agent.
The Oakland Athletics signed Matt Sinatro as a free agent.
The Cincinnati Reds released Chuck Carr.
The Pittsburgh Pirates traded Tony Peña to the St. Louis Cardinals for Mike Dunne, Mike LaValliere and Andy Van Slyke.
- April 2, 1987
The San Diego Padres signed Luis Salazar as a free agent.
The Toronto Blue Jays released Bill Caudill.
The Boston Red Sox released Jim Corsi.
The Houston Astros traded Jeff Calhoun to the Philadelphia Phillies for Ronn Reynolds.
The Atlanta Braves traded Joe Redfield to the California Angels for Stan Cliburn.
- April 3, 1987
The Milwaukee Brewers returned Vicente Palacios (earlier draft pick) to the Pittsburgh Pirates.
The Atlanta Braves signed John Mizerock as a free agent.
The Montreal Expos signed Reid Nichols as a free agent.
The Oakland Athletics signed Alejandro Sánchez as a free agent.
The Chicago Cubs traded Dennis Eckersley and Dan Rohn to the Oakland Athletics for Brian Guinn (minors), Mark Leonette (minors) and Dave Wilder (minors).
- April 4, 1987
The Cleveland Indians signed Steve Carlton as a free agent.
The Toronto Blue Jays signed Odell Jones as a free agent.
The Atlanta Braves released Jeff Bittiger.
- April 5, 1987
The Atlanta Braves signed Mike Fischlin as a free agent.
The Montreal Expos signed Ubaldo Heredia as a free agent.
The Baltimore Orioles released Ravelo Manzanillo.
- April 6, 1987
The Oakland Athletics returned Cliff Young (earlier draft pick) to the Toronto Blue Jays.
The Chicago Cubs signed Dickie Noles as a free agent.
The Baltimore Orioles signed Ron Washington as a free agent.
The St. Louis Cardinals purchased Lee Tunnell from the Pittsburgh Pirates.
The Pittsburgh Pirates released Larry McWilliams.
The California Angels released Jerry Narron.
The California Angels released Rob Wilfong.
- April 7, 1987
The New York Mets signed Bob Gibson as a free agent.
The San Francisco Giants signed Jim Gott as a free agent.
The Baltimore Orioles released Donnie Scott.
- April 8, 1987
The Atlanta Braves signed Mike Brown as a free agent.
- April 9, 1987
The Cincinnati Reds signed Max Venable as a free agent.
- April 10, 1987
The New York Yankees signed Rich Bordi as a free agent.
The Los Angeles Dodgers signed Mickey Hatcher as a free agent.
The New York Yankees signed Al Holland as a free agent.
The Seattle Mariners signed Roy Thomas as a free agent.
The Los Angeles Dodgers released Jerry Reuss.
- April 12, 1987
The Oakland Athletics signed Jim Corsi as a free agent.
- April 13, 1987
The Baltimore Orioles signed Chris Green as a free agent.
The Los Angeles Dodgers signed Pete Ladd as a free agent.
- April 15, 1987
The Minnesota Twins signed Jeff Bittiger as a free agent.
The Houston Astros signed José Canó as a free agent.
The New York Mets signed Alberto Castillo as an amateur free agent.
- April 17, 1987
The Oakland Athletics signed Steve Henderson as a free agent.
The Chicago White Sox signed Ray Krawczyk as a free agent.
The Seattle Mariners signed Jerry Narron as a free agent.
The Toronto Blue Jays released Steve Fireovid.
- April 18, 1987
The Cincinnati Reds signed Jerry Reuss as a free agent.
- April 19, 1987
The San Francisco Giants purchased Jim Adduci from the Milwaukee Brewers.
The New York Yankees released Mike Armstrong.
- April 21, 1987
The San Francisco Giants purchased Dave Schuler from the Milwaukee Brewers.
- April 24, 1987
The Cleveland Indians signed Mike Armstrong as a free agent.
- April 25, 1987
The San Diego Padres traded Tom Meagher (minors) and Mark Wasinger to the San Francisco Giants for Steve Miller (minors) and Colin Ward.
- April 26, 1987
The San Francisco Giants signed Rusty Tillman as a free agent.
The San Francisco Giants returned Jim Adduci to the Milwaukee Brewers following previous purchase.
- April 27, 1987
The Oakland Athletics signed Dennis Lamp as a free agent.
- April 28, 1987
The Milwaukee Brewers signed Len Barker as a free agent.
- April 30, 1987
The Oakland Athletics signed Bill Caudill as a free agent.
The Cleveland Indians released Dar Smith.
- May 1, 1987
The California Angels signed Bob Boone as a free agent.
The New York Yankees signed Ron Guidry as a free agent.
The Montreal Expos signed Tim Raines as a free agent.
The Montreal Expos released Bill Campbell.
- May 2, 1987
The Boston Red Sox signed Rich Gedman as a free agent.
- May 4, 1987
The Philadelphia Phillies signed Dar Smith as a free agent.
The Montreal Expos released Nelson Norman.
- May 5, 1987
The Atlanta Braves signed Doyle Alexander as a free agent.
The San Francisco Giants signed Rob Wilfong as a free agent.
The Detroit Tigers traded Orlando Mercado to the Los Angeles Dodgers for Balvino Gálvez.
The Cleveland Indians traded José Román to the New York Mets for Mike Westbrook (minors).
- May 6, 1987
The Montreal Expos signed Dennis Martínez as a free agent.
The Milwaukee Brewers signed Donnie Scott as a free agent.
- May 10, 1987
The Minnesota Twins traded Bill Latham to the New York Mets for Jason Felice (minors).
- May 11, 1987
The Cleveland Indians traded Don Schulze to the New York Mets for Ricky Nelson.
- May 12, 1987
The Oakland Athletics purchased Brian Harper from San Jose (California).
The Cleveland Indians traded Dave Gallagher to the Seattle Mariners for Mark Huismann.
- May 13, 1987
The Minnesota Twins signed Jim Wilson as a free agent.
The San Francisco Giants released Rob Wilfong.
- May 15, 1987
The New York Yankees signed Rafael Quirico as an amateur free agent.
The Atlanta Braves released Mike Brown.
The Texas Rangers traded Mike Mason to the Chicago Cubs for a player to be named later. The Chicago Cubs sent Dave Pavlas (June 6, 1987) to the Texas Rangers to complete the trade.
- May 16, 1987
The Houston Astros signed Paul Householder as a free agent.
- May 18, 1987
The Atlanta Braves signed Larry McWilliams as a free agent.
The Kansas City Royals signed Lonnie Smith as a free agent.
The New York Yankees released Rich Thompson.
- May 19, 1987
The California Angels signed Doug Corbett as a free agent.
The Pittsburgh Pirates purchased Paul Wilmet from the St. Louis Cardinals.
The Cincinnati Reds released Sal Butera.
- May 22, 1987
The Minnesota Twins signed Sal Butera as a free agent.
The Baltimore Orioles traded Brad Havens and John Shelby to the Los Angeles Dodgers for Tom Niedenfuer.
- May 28, 1987
The San Francisco Giants released Greg Minton.
- May 29, 1987
The Los Angeles Dodgers released Bill Madlock.
The New York Mets traded Scott Little and Al Pedrique to the Pittsburgh Pirates for Bill Almon.
- May 30, 1987
The Baltimore Orioles traded Ricky Jones (minors) to the Minnesota Twins for a player to be named later. The Minnesota Twins sent Ron Musselman (June 12, 1987) to the Baltimore Orioles to complete the trade.
- June, 1987
The Montreal Expos signed Rich Thompson as a free agent.
- June 1, 1987
The Chicago White Sox signed Mike Brown as a free agent.
The California Angels signed Greg Minton as a free agent.
- June 2, 1987
The California Angels released Ty Van Burkleo.
The Houston Astros traded Eric Bullock to the Minnesota Twins for Clay Christiansen.
The Seattle Mariners drafted Ken Griffey Jr. in the 1st round (1st pick) of the 1987 amateur draft.
The Minnesota Twins drafted Willie Banks in the 1st round (3rd pick) of the 1987 amateur draft. Player signed June 15, 1987.
The Chicago Cubs drafted Mike Harkey in the 1st round (4th pick) of the 1987 amateur draft. Player signed June 10, 1987.
The Chicago White Sox drafted Jack McDowell in the 1st round (5th pick) of the 1987 amateur draft. Player signed July 29, 1987.
The Atlanta Braves drafted Derek Lilliquist in the 1st round (6th pick) of the 1987 amateur draft. Player signed August 4, 1987.
The Kansas City Royals drafted Kevin Appier in the 1st round (9th pick) of the 1987 amateur draft.
The Oakland Athletics drafted Lee Tinsley in the 1st round (11th pick) of the 1987 amateur draft. Player signed June 17, 1987.
The Montreal Expos drafted Delino DeShields in the 1st round (12th pick) of the 1987 amateur draft. Player signed June 15, 1987.
The Milwaukee Brewers drafted Bill Spiers in the 1st round (13th pick) of the 1987 amateur draft. Player signed June 10, 1987.
The St. Louis Cardinals drafted Cris Carpenter in the 1st round (14th pick) of the 1987 amateur draft.
The San Francisco Giants drafted Mike Remlinger in the 1st round (16th pick) of the 1987 amateur draft. Player signed June 19, 1987.
The Toronto Blue Jays drafted Alex Sanchez in the 1st round (17th pick) of the 1987 amateur draft.
The Cincinnati Reds drafted Jack Armstrong in the 1st round (18th pick) of the 1987 amateur draft.
The Texas Rangers drafted Brian Bohanon in the 1st round (19th pick) of the 1987 amateur draft. Player signed June 20, 1987.
The Detroit Tigers drafted Steve Pegues in the 1st round (21st pick) of the 1987 amateur draft. Player signed June 3, 1987.
The Houston Astros drafted Craig Biggio in the 1st round (22nd pick) of the 1987 amateur draft. Player signed June 8, 1987.
The Texas Rangers drafted Bill Haselman in the 1st round (23rd pick) of the 1987 amateur draft.
The New York Mets drafted Chris Donnels in the 1st round (24th pick) of the 1987 amateur draft. Player signed June 10, 1987.
The California Angels drafted John Orton in the 1st round (25th pick) of the 1987 amateur draft.
The Boston Red Sox drafted Reggie Harris in the 1st round (26th pick) of the 1987 amateur draft. Player signed June 29, 1987.
The Baltimore Orioles drafted Pete Harnisch in the 1st round (27th pick) of the 1987 amateur draft. Player signed June 5, 1987.
The Texas Rangers drafted Mark Petkovsek in the 1st round (29th pick) of the 1987 amateur draft. Player signed June 29, 1987.
The Detroit Tigers drafted Travis Fryman in the 1st round (30th pick) of the 1987 amateur draft. Player signed June 6, 1987.
The California Angels drafted David Holdridge in the 1st round (31st pick) of the 1987 amateur draft. Player signed August 20, 1987.
The Boston Red Sox drafted Bob Zupcic in the 1st round (32nd pick) of the 1987 amateur draft. Player signed June 9, 1987.
The Toronto Blue Jays drafted Derek Bell in the 2nd round of the 1987 amateur draft. Player signed June 11, 1987.
The Cleveland Indians drafted Albert Belle in the 2nd round of the 1987 amateur draft. Player signed August 27, 1987.
The Cincinnati Reds drafted Freddie Benavides in the 2nd round of the 1987 amateur draft.
The Seattle Mariners drafted Dave Burba in the 2nd round of the 1987 amateur draft.
The California Angels drafted Kevin Flora in the 2nd round of the 1987 amateur draft. Player signed June 9, 1987.
The San Francisco Giants drafted Eric Gunderson in the 2nd round of the 1987 amateur draft. Player signed June 4, 1987.
The Houston Astros drafted Randy Hennis in the 2nd round of the 1987 amateur draft.
The St. Louis Cardinals drafted Jeremy Hernandez in the 2nd round of the 1987 amateur draft.
The New York Mets drafted Todd Hundley in the 2nd round of the 1987 amateur draft. Player signed June 15, 1987.
The Minnesota Twins drafted Terry Jorgensen in the 2nd round of the 1987 amateur draft.
The Chicago White Sox drafted Brent Knackert in the 2nd round of the 1987 amateur draft.
The Montreal Expos drafted Richie Lewis in the 2nd round of the 1987 amateur draft. Player signed July 14, 1987.
The Texas Rangers drafted Barry Manuel in the 2nd round of the 1987 amateur draft. Player signed June 19, 1987.
The Montreal Expos drafted Nate Minchey in the 2nd round of the 1987 amateur draft. Player signed June 11, 1987.
The Detroit Tigers drafted Rob Richie in the 2nd round of the 1987 amateur draft.
The New York Mets drafted Pete Schourek in the 2nd round of the 1987 amateur draft. Player signed June 11, 1987.
The Pittsburgh Pirates drafted Ben Shelton in the 2nd round of the 1987 amateur draft.
The Kansas City Royals drafted Terry Shumpert in the 2nd round of the 1987 amateur draft. Player signed June 3, 1987.
The San Diego Padres drafted Roger Smithberg in the 2nd round of the 1987 amateur draft.
The Chicago Cubs drafted Alex Arias in the 3rd round of the 1987 amateur draft. Player signed June 6, 1987.
The Philadelphia Phillies drafted Kim Batiste in the 3rd round of the 1987 amateur draft. Player signed June 6, 1987.
The San Francisco Giants drafted Mike Benjamin in the 3rd round of the 1987 amateur draft. Player signed June 14, 1987.
The Kansas City Royals drafted Stu Cole in the 3rd round of the 1987 amateur draft.
The Texas Rangers drafted Scott Coolbaugh in the 3rd round of the 1987 amateur draft. Player signed June 18, 1987.
The St. Louis Cardinals drafted Ray Lankford in the 3rd round of the 1987 amateur draft. Player signed June 3, 1987.
The Milwaukee Brewers drafted Jaime Navarro in the 3rd round of the 1987 amateur draft. Player signed June 4, 1987.
The Los Angeles Dodgers drafted Chris Nichting in the 3rd round of the 1987 amateur draft. Player signed August 26, 1987.
The Baltimore Orioles drafted Anthony Telford in the 3rd round of the 1987 amateur draft. Player signed July 9, 1987.
The Montreal Expos drafted John Vander Wal in the 3rd round of the 1987 amateur draft. Player signed June 6, 1987.
The Oakland Athletics drafted Scott Livingstone in the 3rd round of the 1987 amateur draft, but was not signed.
The Pittsburgh Pirates drafted Brian Williams in the 3rd round of the 1987 amateur draft, but was not signed.
The Pittsburgh Pirates drafted Wes Chamberlain in the 4th round of the 1987 amateur draft. Player signed June 12, 1987.
The Oakland Athletics drafted Scott Chiamparino in the 4th round of the 1987 amateur draft.
The California Angels drafted Mark Holzemer in the 4th round of the 1987 amateur draft. Player signed May 29, 1988.
The Texas Rangers drafted Jonathan Hurst in the 4th round of the 1987 amateur draft. Player signed June 5, 1987.
The Detroit Tigers drafted Riccardo Ingram in the 4th round of the 1987 amateur draft. Player signed May 22, 1988.
The Atlanta Braves drafted Keith Mitchell in the 4th round of the 1987 amateur draft. Player signed June 13, 1987.
The Baltimore Orioles drafted Chuck Ricci in the 4th round of the 1987 amateur draft. Player signed June 15, 1987.
The Chicago White Sox drafted Steve Schrenk in the 4th round of the 1987 amateur draft. Player signed June 10, 1987.
The Philadelphia Phillies drafted Ricky Trlicek in the 4th round of the 1987 amateur draft. Player signed June 18, 1987.
The St. Louis Cardinals drafted Mike Ignasiak in the 4th round of the 1987 amateur draft, but was not signed.
The St. Louis Cardinals drafted Rod Brewer in the 5th round of the 1987 amateur draft. Player signed June 9, 1987.
The Montreal Expos drafted Archi Cianfrocco in the 5th round of the 1987 amateur draft. Player signed June 10, 1987.
The Cleveland Indians drafted Tom Kramer in the 5th round of the 1987 amateur draft. Player signed June 10, 1987.
The Detroit Tigers drafted Torey Lovullo in the 5th round of the 1987 amateur draft. Player signed June 7, 1987.
The Texas Rangers drafted Terry Mathews in the 5th round of the 1987 amateur draft. Player signed June 4, 1987.
The Chicago White Sox drafted Dan Rohrmeier in the 5th round of the 1987 amateur draft. Player signed June 8, 1987.
The Milwaukee Brewers drafted Steve Sparks in the 5th round of the 1987 amateur draft. Player signed June 3, 1987.
The Toronto Blue Jays drafted Mike Timlin in the 5th round of the 1987 amateur draft. Player signed June 6, 1987.
The Texas Rangers drafted Kevin Belcher in the 6th round of the 1987 amateur draft.
The Minnesota Twins drafted Larry Casian in the 6th round of the 1987 amateur draft. Player signed June 5, 1987.
The Chicago Cubs drafted Frank Castillo in the 6th round of the 1987 amateur draft. Player signed June 5, 1987.
The Montreal Expos drafted Greg Colbrunn in the 6th round of the 1987 amateur draft. Player signed August 18, 1987.
The Los Angeles Dodgers drafted Darrin Fletcher in the 6th round of the 1987 amateur draft. Player signed June 10, 1987.
The San Diego Padres drafted Dave Hollins in the 6th round of the 1987 amateur draft. Player signed June 6, 1987.
The Chicago White Sox drafted Jerry Kutzler in the 6th round of the 1987 amateur draft.
The Philadelphia Phillies drafted Doug Lindsey in the 6th round of the 1987 amateur draft. Player signed June 7, 1987.
The Milwaukee Brewers drafted Charlie Montoyo in the 6th round of the 1987 amateur draft.
The Seattle Mariners drafted Joe Slusarski in the 6th round of the 1987 amateur draft, but was not signed.
The Los Angeles Dodgers drafted Tony Barron in the 7th round of the 1987 amateur draft. Player signed June 3, 1987.
The New York Yankees drafted Dave Eiland in the 7th round of the 1987 amateur draft. Player signed June 4, 1987.
The Philadelphia Phillies drafted Donnie Elliott in the 7th round of the 1987 amateur draft. Player signed May 30, 1988.
The Montreal Expos drafted Howard Farmer in the 7th round of the 1987 amateur draft.
The Chicago Cubs drafted Matt Franco in the 7th round of the 1987 amateur draft. Player signed June 8, 1987.
The Minnesota Twins drafted Mark Guthrie in the 7th round of the 1987 amateur draft. Player signed June 25, 1987.
The Cincinnati Reds drafted Reggie Sanders in the 7th round of the 1987 amateur draft. Player signed May 20, 1988.
The Texas Rangers drafted Tony Scruggs in the 7th round of the 1987 amateur draft.
The Pittsburgh Pirates drafted Mickey Morandini in the 7th round of the 1987 amateur draft, but was not signed.
The New York Mets drafted Tim Bogar in the 8th round of the 1987 amateur draft. Player signed June 5, 1987.
The Boston Red Sox drafted Jim Byrd in the 8th round of the 1987 amateur draft.
The Atlanta Braves drafted Brian Hunter in the 8th round of the 1987 amateur draft. Player signed June 9, 1987.
The Chicago Cubs drafted Matt Walbeck in the 8th round of the 1987 amateur draft. Player signed June 7, 1987.
The San Diego Padres drafted Marty Cordova in the 8th round of the 1987 amateur draft, but was not signed.
The Seattle Mariners drafted Eric Helfand in the 8th round of the 1987 amateur draft, but was not signed.
The Pittsburgh Pirates drafted Kurt Knudsen in the 8th round of the 1987 amateur draft, but was not signed.
The Cincinnati Reds drafted Jimmy Kremers in the 8th round of the 1987 amateur draft, but was not signed.
The Detroit Tigers drafted Derek Lee in the 8th round of the 1987 amateur draft, but was not signed.
The Milwaukee Brewers drafted Frank Bolick in the 9th round of the 1987 amateur draft. Player signed June 12, 1987.
The San Francisco Giants drafted Gil Heredia in the 9th round of the 1987 amateur draft. Player signed June 6, 1987.
The New York Mets drafted Pat Howell in the 9th round of the 1987 amateur draft. Player signed June 17, 1987.
The Baltimore Orioles drafted Jack Voigt in the 9th round of the 1987 amateur draft. Player signed June 8, 1987.
The Texas Rangers drafted Bert Heffernan in the 9th round of the 1987 amateur draft, but was not signed.
The Toronto Blue Jays drafted Kevin King in the 9th round of the 1987 amateur draft, but was not signed.
The Montreal Expos drafted Donovan Osborne in the 9th round of the 1987 amateur draft, but was not signed.
The Chicago White Sox drafted Rob Lukachyk in the 10th round of the 1987 amateur draft. Player signed June 6, 1987.
The Cleveland Indians drafted Ever Magallanes in the 10th round of the 1987 amateur draft.
The Boston Red Sox drafted Jeff Plympton in the 10th round of the 1987 amateur draft. Player signed June 3, 1987.
The Toronto Blue Jays drafted Darrell Whitmore in the 10th round of the 1987 amateur draft, but was not signed.
The California Angels drafted Rubén Amaro Jr. in the 11th round of the 1987 amateur draft. Player signed June 16, 1987.
The Boston Red Sox drafted Phil Plantier in the 11th round of the 1987 amateur draft. Player signed June 11, 1987.
The Kansas City Royals drafted Kevin McGehee in the 11th round of the 1987 amateur draft, but was not signed.
The Baltimore Orioles drafted Mike Mussina in the 11th round of the 1987 amateur draft, but was not signed.
The Oakland Athletics drafted Jerry Nielsen in the 11th round of the 1987 amateur draft, but was not signed.
The Minnesota Twins drafted Shawn Gilbert in the 12th round of the 1987 amateur draft. Player signed June 3, 1987.
The Chicago White Sox drafted Buddy Groom in the 12th round of the 1987 amateur draft. Player signed June 9, 1987.
The Houston Astros drafted Andy Mota in the 12th round of the 1987 amateur draft.
The New York Mets drafted Terry Bross in the 13th round of the 1987 amateur draft. Player signed June 10, 1987.
The Baltimore Orioles drafted Steve Finley in the 13th round of the 1987 amateur draft. Player signed June 4, 1987.
The Chicago White Sox drafted Dwayne Hosey in the 13th round of the 1987 amateur draft. Player signed June 10, 1987.
The Montreal Expos drafted Bob Natal in the 13th round of the 1987 amateur draft. Player signed June 17, 1987.
The Milwaukee Brewers drafted Troy O'Leary in the 13th round of the 1987 amateur draft. Player signed August 13, 1987.
The Atlanta Braves drafted Mike Stanton in the 13th round of the 1987 amateur draft. Player signed June 10, 1987.
The Toronto Blue Jays drafted Ryan Thompson in the 13th round of the 1987 amateur draft. Player signed June 4, 1987.
The Oakland Athletics drafted Ron Coomer in the 14th round of the 1987 amateur draft. Player signed June 6, 1987.
The Atlanta Braves drafted David Nied in the 14th round of the 1987 amateur draft. Player signed August 16, 1987.
The Cincinnati Reds drafted Bill Risley in the 14th round of the 1987 amateur draft. Player signed June 4, 1987.
The New York Yankees drafted Gerald Williams in the 14th round of the 1987 amateur draft. Player signed June 5, 1987.
The Cincinnati Reds drafted Butch Henry in the 15th round of the 1987 amateur draft. Player signed June 30, 1987.
The Boston Red Sox drafted Desi Wilson in the 15th round of the 1987 amateur draft, but was not signed.
The New York Mets drafted Eric Hillman in the 16th round of the 1987 amateur draft. Player signed June 5, 1987.
The Kansas City Royals drafted Bobby Moore in the 16th round of the 1987 amateur draft.
The Cleveland Indians drafted Steve Olin in the 16th round of the 1987 amateur draft.
The Houston Astros drafted Al Osuna in the 16th round of the 1987 amateur draft. Player signed June 17, 1987.
The Pittsburgh Pirates drafted Steve Carter in the 17th round of the 1987 amateur draft.
The Minnesota Twins drafted Chip Hale in the 17th round of the 1987 amateur draft. Player signed June 5, 1987.
The New York Yankees drafted Terry Bradshaw in the 17th round of the 1987 amateur draft, but was not signed.
The Seattle Mariners drafted Mike Gardiner in the 18th round of the 1987 amateur draft. Player signed June 6, 1987.
The New York Mets drafted Denny Harriger in the 18th round of the 1987 amateur draft. Player signed June 13, 1987.
The San Francisco Giants drafted Erik Johnson in the 18th round of the 1987 amateur draft.
The Baltimore Orioles drafted David Segui in the 18th round of the 1987 amateur draft. Player signed September 15, 1987.
The St. Louis Cardinals drafted Tim Sherrill in the 18th round of the 1987 amateur draft.
The Toronto Blue Jays drafted Dave Haas in the 18th round of the 1987 amateur draft, but was not signed.
The Los Angeles Dodgers drafted Rafael Bournigal in the 19th round of the 1987 amateur draft. Player signed June 15, 1987.
The Montreal Expos drafted Jeff Carter in the 19th round of the 1987 amateur draft.
The Toronto Blue Jays drafted Bob MacDonald in the 19th round of the 1987 amateur draft. Player signed June 5, 1987.
The Pittsburgh Pirates drafted Mike Fyhrie in the 19th round of the 1987 amateur draft, but was not signed.
The Oakland Athletics drafted Scott Brosius in the 20th round of the 1987 amateur draft. Player signed June 9, 1987.
The Houston Astros drafted Dean Hartgraves in the 20th round of the 1987 amateur draft. Player signed June 16, 1987.
The New York Mets drafted John Johnstone in the 20th round of the 1987 amateur draft. Player signed June 6, 1987.
The Los Angeles Dodgers drafted Jose Munoz in the 20th round of the 1987 amateur draft.
The Philadelphia Phillies drafted Jim Vatcher in the 20th round of the 1987 amateur draft. Player signed June 4, 1987.
The Milwaukee Brewers drafted Brian Turang in the 20th round of the 1987 amateur draft, but was not signed.
The Milwaukee Brewers drafted Mark Kiefer in the 21st round of the 1987 amateur draft. Player signed May 18, 1988.
The Detroit Tigers drafted Mike Schwabe in the 21st round of the 1987 amateur draft.
The Los Angeles Dodgers drafted Dennis Springer in the 21st round of the 1987 amateur draft. Player signed June 4, 1987.
The Cleveland Indians drafted Kevin Bearse in the 22nd round of the 1987 amateur draft.
The Baltimore Orioles drafted Ray Giannelli in the 22nd round of the 1987 amateur draft, but was not signed.
The Minnesota Twins drafted Dan Smith in the 22nd round of the 1987 amateur draft, but was not signed.
The San Francisco Giants drafted Mark Dewey in the 23rd round of the 1987 amateur draft.
The San Diego Padres drafted Paul Faries in the 23rd round of the 1987 amateur draft.
The Seattle Mariners drafted Pat Listach in the 23rd round of the 1987 amateur draft, but was not signed.
The Milwaukee Brewers drafted Jeromy Burnitz in the 24th round of the 1987 amateur draft, but was not signed.
The Toronto Blue Jays drafted Erik Schullstrom in the 24th round of the 1987 amateur draft, but was not signed.
The Cleveland Indians drafted Beau Allred in the 25th round of the 1987 amateur draft.
The Milwaukee Brewers drafted Chris Haney in the 25th round of the 1987 amateur draft, but was not signed.
The Boston Red Sox drafted Jayhawk Owens in the 25th round of the 1987 amateur draft, but was not signed.
The Pittsburgh Pirates drafted Bob Ayrault in the 26th round of the 1987 amateur draft, but was not signed.
The San Diego Padres drafted Alan Newman in the 26th round of the 1987 amateur draft, but was not signed.
The Boston Red Sox drafted Stan Spencer in the 26th round of the 1987 amateur draft, but was not signed.
The New York Mets drafted Dan Wilson in the 26th round of the 1987 amateur draft, but was not signed.
The Philadelphia Phillies drafted Toby Borland in the 27th round of the 1987 amateur draft. Player signed August 14, 1987.
The Cincinnati Reds drafted Milt Hill in the 28th round of the 1987 amateur draft.
The Minnesota Twins drafted Bret Boone in the 28th round of the 1987 amateur draft, but was not signed.
The Montreal Expos drafted Kevin Foster in the 29th round of the 1987 amateur draft. Player signed May 24, 1988.
The Los Angeles Dodgers drafted Zak Shinall in the 29th round of the 1987 amateur draft.
The Houston Astros drafted Darryl Kile in the 30th round of the 1987 amateur draft. Player signed May 18, 1988.
The Toronto Blue Jays drafted Steve Wapnick in the 30th round of the 1987 amateur draft.
The Texas Rangers drafted Kevin Mmahat in the 31st round of the 1987 amateur draft.
The Kansas City Royals drafted Jim Campbell in the 32nd round of the 1987 amateur draft.
The Texas Rangers drafted Robb Nen in the 32nd round of the 1987 amateur draft. Player signed June 29, 1987.
The Detroit Tigers drafted Rusty Meacham in the 33rd round of the 1987 amateur draft. Player signed May 11, 1988.
The Kansas City Royals drafted Jorge Pedre in the 33rd round of the 1987 amateur draft.
The Chicago Cubs drafted Fernando Ramsey in the 33rd round of the 1987 amateur draft. Player signed June 5, 1987.
The Baltimore Orioles drafted Kirk Dressendorfer in the 34th round of the 1987 amateur draft, but was not signed.
The Houston Astros drafted Scott Erickson in the 34th round of the 1987 amateur draft, but was not signed.
The Los Angeles Dodgers drafted Jim Poole in the 34th round of the 1987 amateur draft, but was not signed.
The San Francisco Giants drafted Jimmy Myers in the 35th round of the 1987 amateur draft. Player signed June 7, 1987.
The Texas Rangers drafted Ed Pierce in the 35th round of the 1987 amateur draft, but was not signed.
The Philadelphia Phillies drafted Greg McCarthy in the 36th round of the 1987 amateur draft. Player signed June 7, 1987.
The Minnesota Twins drafted Craig Paquette in the 36th round of the 1987 amateur draft, but was not signed.
The Philadelphia Phillies drafted Andy Carter in the 37th round of the 1987 amateur draft. Player signed June 7, 1987.
The Chicago Cubs drafted Jeff Cirillo in the 37th round of the 1987 amateur draft, but was not signed.
The Houston Astros drafted Lance Dickson in the 37th round of the 1987 amateur draft, but was not signed.
The Seattle Mariners drafted Todd Haney in the 38th round of the 1987 amateur draft. Player signed June 9, 1987.
The Chicago Cubs drafted Tom Thobe in the 38th round of the 1987 amateur draft. Player signed May 22, 1988.
The New York Mets drafted Anthony Young in the 38th round of the 1987 amateur draft. Player signed June 6, 1987.
The Cincinnati Reds drafted Tim Costo in the 41st round of the 1987 amateur draft, but was not signed.
The Seattle Mariners drafted Gar Finnvold in the 42nd round of the 1987 amateur draft, but was not signed.
The New York Yankees drafted James Mouton in the 42nd round of the 1987 amateur draft, but was not signed.
The Los Angeles Dodgers drafted Mike James in the 43rd round of the 1987 amateur draft. Player signed May 21, 1988.
The Cincinnati Reds drafted Glenn Sutko in the 45th round of the 1987 amateur draft.
The Toronto Blue Jays drafted Darren Lewis in the 45th round of the 1987 amateur draft, but was not signed.
The Los Angeles Dodgers drafted Doug Simons in the 45th round of the 1987 amateur draft, but was not signed.
The Seattle Mariners drafted Jeff Darwin in the 46th round of the 1987 amateur draft, but was not signed.
The Texas Rangers drafted Keith Osik in the 47th round of the 1987 amateur draft, but was not signed.
The New York Yankees drafted Brad Ausmus in the 48th round of the 1987 amateur draft.
The Kansas City Royals drafted Tim Laker in the 49th round of the 1987 amateur draft, but was not signed.
The Seattle Mariners drafted James Hurst in the 52nd round of the 1987 amateur draft, but was not signed.
The Pittsburgh Pirates drafted Paul Miller in the 53rd round of the 1987 amateur draft.
The Kansas City Royals drafted Jeff Conine in the 58th round of the 1987 amateur draft. Player signed September 10, 1987.
The Kansas City Royals drafted Mark Small in the 59th round of the 1987 amateur draft, but was not signed.
The Kansas City Royals drafted Bret Barberie in the 65th round of the 1987 amateur draft, but was not signed.
The Kansas City Royals drafted Erik Plantenberg in the 66th round of the 1987 amateur draft, but was not signed.
The Toronto Blue Jays drafted Tom Marsh in the 70th round of the 1987 amateur draft, but was not signed.
- June 4, 1987
The Detroit Tigers signed Bill Madlock as a free agent.
The San Francisco Giants signed Rod Scurry as a free agent.
The Cleveland Indians signed Sammy Stewart as a free agent.
The Milwaukee Brewers released Jim Adduci.
The Baltimore Orioles released Tippy Martinez.
The Minnesota Twins traded Dave Blakley (minors) to the San Diego Padres for Tom Gorman.
The Seattle Mariners traded Ross Jones to the Kansas City Royals for a player to be named later. The Kansas City Royals sent Ricky Rojas (minors) (October 19, 1987) to the Seattle Mariners to complete the trade.
- June 5, 1987
The Toronto Blue Jays signed Charlie Moore as a free agent.
The San Francisco Giants purchased Iván de Jesús from the St. Louis Cardinals.
The California Angels released Sap Randall.
The New York Yankees released Bob Shirley.
- June 7, 1987
The Detroit Tigers signed Rudy Pemberton as an amateur free agent.
The Minnesota Twins traded Mark Salas to the New York Yankees for Joe Niekro.
- June 8, 1987
The Montreal Expos signed Quinn Mack as an amateur free agent.
The Atlanta Braves released Al Pardo.
- June 9, 1987
The St. Louis Cardinals signed Dan Driessen as a free agent.
- June 10, 1987
The Atlanta Braves signed Dale Polley as an amateur free agent.
The Cleveland Indians released Gibson Alba.
The New York Yankees traded Keith Hughes and Shane Turner to the Philadelphia Phillies for Mike Easler.
- June 11, 1987
The Milwaukee Brewers signed Gibson Alba as a free agent.
The California Angels signed Gary Buckels as an amateur free agent.
- June 12, 1987
The Los Angeles Dodgers signed Danny Heep as a free agent.
- June 13, 1987
The Kansas City Royals signed Bob Shirley as a free agent.
- June 14, 1987
The Cincinnati Reds released Jerry Reuss.
- June 15, 1987
The Seattle Mariners signed Chuck Carr as a free agent.
The Minnesota Twins signed Terry Forster as a free agent.
The Cleveland Indians released Chris Beasley.
The Pittsburgh Pirates released Onix Concepción.
The Milwaukee Brewers released Jim Morris.
- June 17, 1987
The San Diego Padres released LaMarr Hoyt.
The Kansas City Royals released Jorge Orta.
- June 18, 1987
The Detroit Tigers purchased Ron Meridith from the Texas Rangers.
- June 19, 1987
The Cincinnati Reds signed Dave Collins as a free agent.
The California Angels signed Jerry Reuss as a free agent.
The California Angels released Doug Corbett.
The Houston Astros traded Phil Garner to the Los Angeles Dodgers for a player to be named later. The Los Angeles Dodgers sent Jeff Edwards (minors) (June 26, 1987) to the Houston Astros to complete the trade.
- June 22, 1987
The Milwaukee Brewers signed Roy Lee Jackson as a free agent.
The Oakland Athletics signed Francisco Matos as an amateur free agent.
The Oakland Athletics signed Henry Mercedes as an amateur free agent.
The Houston Astros released Aurelio López.
The Detroit Tigers traded Bryan Kelly to the Seattle Mariners for Karl Best.
- June 23, 1987
The Philadelphia Phillies signed Doug Bair as a free agent.
The Baltimore Orioles signed Doug Corbett as a free agent.
The Los Angeles Dodgers traded Tim Meeks (minors) to the Oakland Athletics for Bill Krueger.
- June 24, 1987
The Minnesota Twins traded Tom Schwarz (minors) and Danny Clay to the Philadelphia Phillies for Dan Schatzeder and cash.
- June 25, 1987
The Los Angeles Dodgers traded Larry See to the Texas Rangers for José Mota.
- June 26, 1987
The Detroit Tigers traded Terry Harper to the Pittsburgh Pirates for Pete Rice (minors) and Shawn Holman.
- June 29, 1987
The San Francisco Giants released Mike Woodard.
The Milwaukee Brewers traded Russ McGinnis to the Oakland Athletics for Bill Mooneyham.
- June 30, 1987
The Montreal Expos sent Curt Brown to the Milwaukee Brewers as part of a conditional deal.
The Seattle Mariners signed Chris Beasley as a free agent.
The Chicago White Sox signed Ramón García as an amateur free agent.
The Seattle Mariners signed Wade Taylor as an amateur free agent.
Yokohama Bay Stars (Japan Central) purchased John Pacella from the Detroit Tigers.
- July, 1987
The Montreal Expos released Rich Thompson.
- July 1, 1987
The California Angels signed Tony Armas as a free agent.
The Chicago White Sox signed LaMarr Hoyt as a free agent.
- July 2, 1987
The Houston Astros signed Mike Woodard as a free agent.
The Oakland Athletics traded Eric Broersma (minors) to the Milwaukee Brewers for a player to be named later. The Milwaukee Brewers sent Curt Brown (August 5, 1987) to the Oakland Athletics to complete the trade.
- July 4, 1987
The St. Louis Cardinals released Tito Landrum.
The Kansas City Royals released Bob Shirley.
- July 5, 1987
The San Diego Padres traded Dave Dravecky, Craig Lefferts and Kevin Mitchell to the San Francisco Giants for Chris Brown, Keith Comstock, Mark Davis and Mark Grant.
- July 10, 1987
The Los Angeles Dodgers signed Tito Landrum as a free agent.
- July 11, 1987
The St. Louis Cardinals signed David Green as a free agent.
The San Francisco Giants signed Dave Kingman as a free agent.
The Baltimore Orioles released Rick Burleson.
The Seattle Mariners released Bob Kearney.
The Chicago Cubs traded Gary Matthews to the Seattle Mariners for a player to be named later. The Seattle Mariners sent Dave Hartnett (minors) (July 12, 1987) to the Chicago Cubs to complete the trade.
- July 12, 1987
The Texas Rangers signed Steve Howe as a free agent.
- July 13, 1987
The Cincinnati Reds signed Jim Wohlford as a free agent.
The Chicago White Sox signed Mike Maksudian as an amateur free agent.
The Chicago Cubs traded Steve Trout to the New York Yankees for Rich Scheid, Bob Tewksbury and Dean Wilkins.
- July 14, 1987
The Kansas City Royals traded Juan Beníquez to the Toronto Blue Jays for Luis Aquino.
- July 15, 1987
The Oakland Athletics released Ron Cey.
The Cleveland Indians traded Tony Bernazard to the Oakland Athletics for Darrel Akerfelds and Brian Dorsett.
- July 16, 1987
The Milwaukee Brewers purchased Skeeter Barnes from the St. Louis Cardinals.
- July 17, 1987
The San Francisco Giants released Iván de Jesús.
- July 20, 1987
The Los Angeles Dodgers signed Julio Cruz as a free agent.
- July 21, 1987
The Kansas City Royals released Hal McRae.
- July 23, 1987
The Oakland Athletics signed Bob Kearney as a free agent.
The Kansas City Royals purchased Dann Bilardello from the Pittsburgh Pirates.
The Boston Red Sox released Bill Buckner.
- July 24, 1987
The New York Mets signed Al Pardo as a free agent.
- July 25, 1987
The Atlanta Braves released Larry McWilliams.
The Atlanta Braves traded Randy O'Neal to the St. Louis Cardinals for Joe Boever.
- July 28, 1987
The California Angels signed Bill Buckner as a free agent.
- July 29, 1987
The Oakland Athletics released Johnnie LeMaster.
- July 30, 1987
The Milwaukee Brewers signed Ray Burris as a free agent.
The Toronto Blue Jays signed Nigel Wilson as an amateur free agent.
The Chicago White Sox traded Bryce Hulstrom (minors) to the St. Louis Cardinals for Dave LaPoint.
The Houston Astros traded Mel Stottlemyre to the Kansas City Royals for Buddy Biancalana.
- July 31, 1987
The New York Yankees signed Bob Shirley as a free agent.
The Cleveland Indians traded Steve Carlton to the Minnesota Twins for a player to be named later. The Minnesota Twins sent Jeff Perry (minors) (August 18, 1987) to the Cleveland Indians to complete the trade.
The Texas Rangers traded Dave Owen to the Kansas City Royals for a player to be named later. The Kansas City Royals sent Rufus Ellis (minors) (October 13, 1987) to the Texas Rangers to complete the trade.
The Pittsburgh Pirates traded Don Robinson to the San Francisco Giants for Mackey Sasser and $50,000.
- August 3, 1987
The Pittsburgh Pirates selected Jim Gott off waivers from the San Francisco Giants.
- August 4, 1987
The Toronto Blue Jays signed Domingo Cedeño as an amateur free agent.
The Chicago Cubs released Ron Davis.
- August 5, 1987
The Montreal Expos signed Joe Siddall as an amateur free agent.
The Seattle Mariners released Roy Thomas.
- August 6, 1987
The Chicago White Sox signed Johnnie LeMaster as a free agent.
The Texas Rangers signed Larry McWilliams as a free agent.
- August 7, 1987
The Detroit Tigers traded a player to be named later and Darnell Coles to the Pittsburgh Pirates for Jim Morrison. The Detroit Tigers sent Morris Madden (August 12, 1987) to the Pittsburgh Pirates to complete the trade.
- August 8, 1987
The Cleveland Indians signed Roy Thomas as a free agent.
- August 9, 1987
The Cleveland Indians traded Phil Niekro to the Toronto Blue Jays for a player to be named later and Darryl Landrum (minors). The Toronto Blue Jays sent Don Gordon (August 10, 1987) to the Cleveland Indians to complete the trade.
- August 10, 1987
The Kansas City Royals signed Rich Thompson as a free agent.
The Philadelphia Phillies released Tom Hume.
- August 11, 1987
The Baltimore Orioles traded Nelson Simmons to the Seattle Mariners for a player to be named later. The Seattle Mariners sent Mike Brown (August 26, 1987) to the Baltimore Orioles to complete the trade.
- August 12, 1987
The Atlanta Braves traded Doyle Alexander to the Detroit Tigers for John Smoltz.
- August 13, 1987
The Los Angeles Dodgers signed Ron Davis as a free agent.
The Baltimore Orioles traded Kurt Beamesderfer (minors) to the Texas Rangers for Greg Ferlenda (minors).
- August 18, 1987
The Cincinnati Reds signed Tom Hume as a free agent.
The Toronto Blue Jays signed Denis Boucher as an amateur free agent.
- August 21, 1987
The Baltimore Orioles released Doug Corbett.
The Chicago White Sox released Kevin Hickey.
The Boston Red Sox traded Glenn Hoffman to the Los Angeles Dodgers for a player to be named later. The Los Angeles Dodgers sent Billy Bartels (minors) (December 8, 1987) to the Boston Red Sox to complete the trade.
The Pittsburgh Pirates traded Rick Reuschel to the San Francisco Giants for Scott Medvin and Jeff Robinson.
- August 22, 1987
The San Francisco Giants signed Kevin Hickey as a free agent.
- August 25, 1987
The Toronto Blue Jays released Gary Lavelle.
- August 26, 1987
The Cincinnati Reds traded Bill Gullickson to the New York Yankees for Dennis Rasmussen.
The Chicago White Sox traded Mike Soper (minors) and Jerry Royster to the New York Yankees for a player to be named later and Ken Patterson. The New York Yankees sent Jeff Pries (minors) (September 19, 1987) to the Chicago White Sox to complete the trade.
- August 29, 1987
The Chicago White Sox released Neil Allen.
The California Angels traded a player to be named later and Bill Merrifield (minors) to the Pittsburgh Pirates for Johnny Ray. The California Angels sent Miguel García (September 3, 1987) to the Pittsburgh Pirates to complete the trade.
The Los Angeles Dodgers traded Rick Honeycutt to the Oakland Athletics for a player to be named later. The Oakland Athletics sent Tim Belcher (September 3, 1987) to the Los Angeles Dodgers to complete the trade.
- August 30, 1987
The San Diego Padres traded Storm Davis to the Oakland Athletics for players to be named later. The Oakland Athletics sent Dave Leiper (August 31, 1987) and Rob Nelson (September 8, 1987) to the San Diego Padres to complete the trade.
- August 31, 1987
The Oakland Athletics signed Gary Lavelle as a free agent.
The Toronto Blue Jays released Phil Niekro.
The Baltimore Orioles traded Mike Flanagan to the Toronto Blue Jays for a player to be named later and Oswaldo Peraza. The Toronto Blue Jays sent José Mesa (September 4, 1987) to the Baltimore Orioles to complete the trade.
The Atlanta Braves traded Gene Garber to the Kansas City Royals for a player to be named later. The Kansas City Royals sent Terry Bell (September 3, 1987) to the Atlanta Braves to complete the trade.
The St. Louis Cardinals traded Pat Perry to the Cincinnati Reds for a player to be named later. The Cincinnati Reds sent Scott Terry (September 3, 1987) to the St. Louis Cardinals to complete the trade.
- September 1, 1987
The Boston Red Sox traded Don Baylor to the Minnesota Twins for a player to be named later. The Minnesota Twins sent Enrique Rios (minors) (December 18, 1987) to the Boston Red Sox to complete the trade.
The Boston Red Sox traded Dave Henderson to the San Francisco Giants for a player to be named later. The San Francisco Giants sent Randy Kutcher (December 9, 1987) to the Boston Red Sox to complete the trade.
- September 2, 1987
The New York Mets signed Tito Navarro as an amateur free agent.
- September 4, 1987
The New York Yankees signed Neil Allen as a free agent.
- September 7, 1987
The Detroit Tigers signed John Kiely as an amateur free agent.
- September 9, 1987
The San Diego Padres signed Luis López as an amateur free agent.
- September 15, 1987
The California Angels traded John Candelaria to the New York Mets for Shane Young (minors) and Jeff Richardson.
- September 17, 1987
The New York Yankees signed Orlando Miller as an amateur free agent.
The New York Yankees signed Sherman Obando as an amateur free agent.
- September 21, 1987
The Chicago Cubs traded Dickie Noles to the Detroit Tigers for player to be named later. Dickie Noles returned to original team on October 23, 1987.
- September 22, 1987
The Los Angeles Dodgers traded Juan Guzmán to the Toronto Blue Jays for Mike Sharperson.
- September 23, 1987
The Atlanta Braves signed Phil Niekro as a free agent.
The California Angels released Doug DeCinces.
- September 29, 1987
The St. Louis Cardinals signed Doug DeCinces as a free agent.
The Baltimore Orioles released Alan Wiggins.
- September 30, 1987
The Seattle Mariners released Dave Gallagher.
The Montreal Expos released Lary Sorensen.
The Houston Astros traded Julio Solano to the Seattle Mariners for Doug Givler (minors).
- October, 1987
Dallas Williams of the Montreal Expos granted free agency.
The California Angels released T.R. Bryden.
The Atlanta Braves released Chuck Hensley.
- October 2, 1987
The St. Louis Cardinals released Ray Soff.
- October 5, 1987
The Pittsburgh Pirates released U L Washington.
The Detroit Tigers traded Bruce Fields to the Seattle Mariners for Stan Clarke.
The San Diego Padres traded Ed Wojna to the Chicago White Sox for a player to be named later. The Chicago White Sox sent Joel McKeon (February 11, 1988) to the San Diego Padres to complete the trade.
- October 6, 1987
The Milwaukee Brewers purchased Tom Filer from the Toronto Blue Jays.
- October 7, 1987
The Boston Red Sox signed Don Florence as an amateur free agent.
The St. Louis Cardinals released Doug DeCinces.
- October 8, 1987
Luis DeLeón of the Baltimore Orioles granted free agency.
The Baltimore Orioles released Tony Arnold.
The Baltimore Orioles released Mike Hart.
The Baltimore Orioles released Mike Kinnunen.
The Baltimore Orioles released Floyd Rayford.
- October 12, 1987
The Oakland Athletics released Brian Harper.
The Oakland Athletics released Matt Sinatro.
The Oakland Athletics released Jerry Willard.
- October 13, 1987
The Houston Astros released Dale Berra.
The Houston Astros released Ronn Reynolds.
- October 15, 1987
The Boston Red Sox signed Alex Delgado as an amateur free agent.
Skeeter Barnes of the Milwaukee Brewers granted free agency.
Curt Brown of the Oakland Athletics granted free agency.
Mike Brown of the Baltimore Orioles granted free agency.
Bob Buchanan of the New York Mets granted free agency.
Eric Bullock of the Minnesota Twins granted free agency.
Ernie Camacho of the Cleveland Indians granted free agency.
Nick Capra of the Texas Rangers granted free agency.
Ralph Citarella of the Chicago White Sox granted free agency.
Bryan Clark of the Chicago White Sox granted free agency.
Bryan Clutterbuck of the Milwaukee Brewers granted free agency.
Chris Codiroli of the Oakland Athletics granted free agency.
Keith Creel of the Texas Rangers granted free agency.
Butch Davis of the Pittsburgh Pirates granted free agency.
Juan Eichelberger of the Atlanta Braves granted free agency.
Álvaro Espinoza of the Minnesota Twins granted free agency.
Dan Firova of the Seattle Mariners granted free agency.
Tony Fossas of the California Angels granted free agency.
Bob Gibson of the New York Mets granted free agency.
Brian Giles of the Chicago White Sox granted free agency.
Tom Gorman of the Minnesota Twins granted free agency.
Dave Gumpert of the Kansas City Royals granted free agency.
Ubaldo Heredia of the Montreal Expos granted free agency.
Kevin Hickey of the San Francisco Giants granted free agency.
Paul Householder of the Houston Astros granted free agency.
Rex Hudler of the Baltimore Orioles granted free agency.
Houston Jiménez of the Pittsburgh Pirates granted free agency.
Odell Jones of the Toronto Blue Jays granted free agency.
Ed Jurak of the Texas Rangers granted free agency.
Bob Kearney of the Oakland Athletics granted free agency.
Ron Mathis of the Houston Astros granted free agency.
Darryl Motley of the Atlanta Braves granted free agency.
Randy Niemann of the Minnesota Twins granted free agency.
Otis Nixon of the Cleveland Indians granted free agency.
Francisco Oliveras of the Baltimore Orioles granted free agency.
Casey Parsons of the Cleveland Indians granted free agency.
John Rabb of the Atlanta Braves granted free agency.
Victor Rodriguez of the St. Louis Cardinals granted free agency.
Tom Romano of the Montreal Expos granted free agency.
Mark Ross of the Pittsburgh Pirates granted free agency.
Dave Rucker of the Texas Rangers granted free agency.
Dave Sax of the Boston Red Sox granted free agency.
Jeff Schaefer of the Los Angeles Dodgers granted free agency.
Don Schulze of the New York Mets granted free agency.
José Segura of the Toronto Blue Jays granted free agency.
Steve Shields of the Seattle Mariners granted free agency.
Razor Shines of the Montreal Expos granted free agency.
Nelson Simmons of the Seattle Mariners granted free agency.
Craig Smajstrla of the Cleveland Indians granted free agency.
Dar Smith of the Philadelphia Phillies granted free agency.
Brian Snyder of the San Diego Padres granted free agency.
James Steels of the San Diego Padres granted free agency.
John Stefero of the Montreal Expos granted free agency.
Roy Thomas of the Cleveland Indians granted free agency.
Tim Tolman of the Detroit Tigers granted free agency.
Kelvin Torve of the Baltimore Orioles granted free agency.
Dave Van Gorder of the Baltimore Orioles granted free agency.
DeWayne Vaughn of the New York Mets granted free agency.
Max Venable of the Cincinnati Reds granted free agency.
Dave Von Ohlen of the Oakland Athletics granted free agency.
Duane Walker of the St. Louis Cardinals granted free agency.
Kevin Ward of the Philadelphia Phillies granted free agency.
Brad Wellman of the Los Angeles Dodgers granted free agency.
Jim Wilson of the Minnesota Twins granted free agency.
Mike Woodard of the Houston Astros granted free agency.
The Kansas City Royals released Ross Jones.
The Texas Rangers released Steve Kemp.
The Philadelphia Phillies released Ron Roenicke.
The Kansas City Royals released Bob Stoddard.
The New York Yankees released Paul Zuvella.
- October 16, 1987
The Detroit Tigers released Johnny Grubb.
The Detroit Tigers released Dwight Lowry.
The Detroit Tigers released Nate Snell.
The California Angels traded Todd Fischer (minors) to the Chicago Cubs for Chico Walker.
- October 19, 1987
Dennis Lamp of the Oakland Athletics granted free agency.
- October 20, 1987
Luis Salazar of the San Diego Padres granted free agency.
- October 21, 1987
The Cincinnati Reds released Ron Oester.
- October 23, 1987
The Kansas City Royals signed Steve Fireovid as a free agent.
The Minnesota Twins signed Dwight Lowry as a free agent.
The Texas Rangers signed James Steels as a free agent.
The Toronto Blue Jays released Charlie Moore.
- October 24, 1987
The Baltimore Orioles signed Francisco de la Rosa as a free agent.
- October 26, 1987
The Kansas City Royals signed Brad Wellman as a free agent.
- October 27, 1987
The Cincinnati Reds released Tom Hume.
The Cincinnati Reds released Bill Scherrer.
- October 28, 1987
Nippon Ham Fighters (Japan Pacific) purchased Brian Dayett from the Chicago Cubs.
- October 29, 1987
The Cleveland Indians released Rick Dempsey.
The Cleveland Indians released Jamie Easterly.
The Cleveland Indians released Sammy Stewart.
- October 30, 1987
The California Angels released Don Sutton.
- October 31, 1987
The Texas Rangers signed Dave Sax as a free agent.
The Texas Rangers signed Dallas Williams as a free agent.
- November 2, 1987
Terry Francona of the Cincinnati Reds granted free agency.
The New York Yankees released Juan Bonilla.
The New York Yankees released Al Holland.
The New York Yankees released Lenn Sakata.
The Texas Rangers traded Don Slaught to the New York Yankees for a player to be named later. The New York Yankees sent Brad Arnsberg (November 10, 1987) to the Texas Rangers to complete the trade.
- November 6, 1987
The Atlanta Braves signed Javy López as an amateur free agent.
The Philadelphia Phillies released Ken Dowell.
The Baltimore Orioles traded Terry Crowley (minors) and Rico Rossy to the Pittsburgh Pirates for Joe Orsulak.
The Cincinnati Reds traded Ted Power and Kurt Stillwell to the Kansas City Royals for Danny Jackson and Angel Salazar.
- November 7, 1987
The Minnesota Twins signed Eric Bullock as a free agent.
- November 8, 1987
Bob Dernier of the Chicago Cubs granted free agency.
- November 9, 1987
Bill Almon of the New York Mets granted free agency.
Larry Andersen of the Houston Astros granted free agency.
Joaquín Andújar of the Oakland Athletics granted free agency.
Chris Bando of the Cleveland Indians granted free agency.
Juan Berenguer of the Minnesota Twins granted free agency.
Bruce Bochy of the San Diego Padres granted free agency.
Thad Bosley of the Kansas City Royals granted free agency.
Brett Butler of the Cleveland Indians granted free agency.
John Candelaria of the New York Mets granted free agency.
Jack Clark of the St. Louis Cardinals granted free agency.
Mark Clear of the Milwaukee Brewers granted free agency.
Dave Collins of the Cincinnati Reds granted free agency.
Steve Crawford of the Boston Red Sox granted free agency.
José Cruz of the Houston Astros granted free agency.
Danny Darwin of the Houston Astros granted free agency.
Chili Davis of the San Francisco Giants granted free agency.
Mike Davis of the Oakland Athletics granted free agency.
Dave Engle of the Montreal Expos granted free agency.
George Frazier of the Minnesota Twins granted free agency.
Gary Gaetti of the Minnesota Twins granted free agency.
Gene Garber of the Kansas City Royals granted free agency.
Phil Garner of the Los Angeles Dodgers granted free agency.
Steve Garvey of the San Diego Padres granted free agency.
Ken Griffey of the Atlanta Braves granted free agency.
Bill Gullickson of the New York Yankees granted free agency.
Moose Haas of the Oakland Athletics granted free agency.
Atlee Hammaker of the San Francisco Giants granted free agency.
Terry Harper of the Pittsburgh Pirates granted free agency.
Mike Heath of the Detroit Tigers granted free agency.
Dave Henderson of the San Francisco Giants granted free agency.
Steve Henderson of the Oakland Athletics granted free agency.
Glenn Hubbard of the Atlanta Braves granted free agency.
Garth Iorg of the Toronto Blue Jays granted free agency.
Tommy John of the New York Yankees granted free agency.
Ruppert Jones of the California Angels granted free agency.
Mike LaCoss of the San Francisco Giants granted free agency.
Ken Landreaux of the Los Angeles Dodgers granted free agency.
Dave LaPoint of the Chicago White Sox granted free agency.
Tim Laudner of the Minnesota Twins granted free agency.
Gary Lavelle of the Oakland Athletics granted free agency.
Charlie Lea of the Montreal Expos granted free agency.
Charlie Leibrandt of the Kansas City Royals granted free agency.
Gary Lucas of the California Angels granted free agency.
Ed Lynch of the Chicago Cubs granted free agency.
Bill Madlock of the Detroit Tigers granted free agency.
Rick Manning of the Milwaukee Brewers granted free agency.
Dennis Martínez of the Montreal Expos granted free agency.
Gary Matthews of the Seattle Mariners granted free agency.
Lee Mazzilli of the New York Mets granted free agency.
Bob McClure of the Montreal Expos granted free agency.
Eddie Milner of the San Francisco Giants granted free agency.
Greg Minton of the California Angels granted free agency.
Paul Molitor of the Milwaukee Brewers granted free agency.
Bill Mooneyham of the Milwaukee Brewers granted free agency.
Jack Morris of the Detroit Tigers granted free agency.
Dwayne Murphy of the Oakland Athletics granted free agency.
Graig Nettles of the Atlanta Braves granted free agency.
Reid Nichols of the Montreal Expos granted free agency.
Dickie Noles of the Chicago Cubs granted free agency.
Tom Paciorek of the Texas Rangers granted free agency.
David Palmer of the Atlanta Braves granted free agency.
Joe Price of the San Francisco Giants granted free agency.
Jamie Quirk of the Kansas City Royals granted free agency.
Jerry Reuss of the California Angels granted free agency.
Dave Righetti of the New York Yankees granted free agency.
Joe Sambito of the Boston Red Sox granted free agency.
Bryn Smith of the Montreal Expos granted free agency.
Dave Smith of the Houston Astros granted free agency.
Frank Tanana of the Detroit Tigers granted free agency.
Dickie Thon of the Houston Astros granted free agency.
Manny Trillo of the Chicago Cubs granted free agency.
Ed Vande Berg of the Cleveland Indians granted free agency.
Mike Witt of the California Angels granted free agency.
Joel Youngblood of the San Francisco Giants granted free agency.
The St. Louis Cardinals released Dan Driessen.
The Detroit Tigers released Larry Herndon.
- November 10, 1987
The Milwaukee Brewers signed Odell Jones as a free agent.
The Oakland Athletics signed Ed Jurak as a free agent.
- November 11, 1987
The Milwaukee Brewers signed Bryan Clutterbuck as a free agent.
The Milwaukee Brewers signed Bill Mooneyham as a free agent.
The New York Yankees signed Steve Shields as a free agent.
The New York Mets traded Terry Blocker to the Atlanta Braves for a player to be named later. The Atlanta Braves sent Kevin Brown (December 8, 1987) to the New York Mets to complete the trade.
- November 12, 1987
The Texas Rangers signed DeWayne Vaughn as a free agent.
The Texas Rangers signed José Oliva as an amateur free agent.
The Minnesota Twins released Jeff Bittiger.
The Pittsburgh Pirates released Logan Easley.
The Los Angeles Dodgers released Bill Krueger.
The Houston Astros released Davey Lopes.
The Los Angeles Dodgers released Orlando Mercado.
The Chicago White Sox traded Richard Dotson and Scott Nielsen to the New York Yankees for Dan Pasqua, Steve Rosenberg and Mark Salas.
- November 13, 1987
The Atlanta Braves signed Ken Griffey as a free agent.
- November 15, 1987
Bill Laskey of the Detroit Tigers granted free agency.
- November 16, 1987
The Chicago White Sox signed Jeff Schaefer as a free agent.
- November 17, 1987
The New York Yankees signed Álvaro Espinoza as a free agent.
- November 18, 1987
The Kansas City Royals signed Bob Buchanan as a free agent.
The Seattle Mariners released Jim Weaver.
- November 19, 1987
Vance Law of the Montreal Expos granted free agency.
- November 20, 1987
The Pittsburgh Pirates signed Skeeter Barnes as a free agent.
The Seattle Mariners released Jerry Narron.
- November 21, 1987
The Chicago White Sox signed Mike Woodard as a free agent.
The Los Angeles Dodgers signed Pedro Astacio as an amateur free agent.
- November 22, 1987
Craig McMurtry of the Toronto Blue Jays granted free agency.
The Chicago White Sox released Ray Krawczyk.
- November 23, 1987
The Chicago White Sox released Pat Keedy.
- November 24, 1987
The San Francisco Giants signed Mike LaCoss as a free agent.
The Pittsburgh Pirates signed Tom Romano as a free agent.
- November 27, 1987
The Houston Astros signed Craig Smajstrla as a free agent.
- November 30, 1987
Ron Hassey of the Chicago White Sox granted free agency.
The Cleveland Indians released Andre Thornton.
- December, 1987
The Minnesota Twins signed Francisco Oliveras as a free agent.
- December 1, 1987
The San Francisco Giants signed Brett Butler as a free agent.
The California Angels signed Chili Davis as a free agent.
The Texas Rangers signed Tony Fossas as a free agent.
The Detroit Tigers signed Mike Heath as a free agent.
The San Francisco Giants signed Joel Youngblood as a free agent.
- December 3, 1987
The Pittsburgh Pirates signed Logan Easley as a free agent.
The California Angels signed Greg Minton as a free agent.
- December 5, 1987
The Los Angeles Dodgers signed Tony Arnold as a free agent.
The Los Angeles Dodgers signed Chuck Hensley as a free agent.
The California Angels traded Gary Pettis to the Detroit Tigers for Dan Petry.
- December 6, 1987
The Atlanta Braves signed Graig Nettles as a free agent.
- December 7, 1987
The Baltimore Orioles drafted José Bautista from the New York Mets in the 1987 rule 5 draft.
The Kansas City Royals drafted Luis Encarnación from the Cleveland Indians in the 1987 rule 5 draft.
The Oakland Athletics drafted Doug Jennings from the California Angels in the 1987 rule 5 draft.
The California Angels drafted Joe Johnson from the Toronto Blue Jays in the 1987 rule 5 draft.
The Houston Astros drafted Scott Medvin from the Pittsburgh Pirates in the 1987 rule 5 draft.
The Montreal Expos drafted Rich Sauveur from the Pittsburgh Pirates in the 1987 rule 5 draft.
The Boston Red Sox drafted John Trautwein from the Montreal Expos in the 1987 rule 5 draft.
The Detroit Tigers drafted John Wetteland from the Los Angeles Dodgers in the 1987 rule 5 draft.
The Cleveland Indians signed Chris Bando as a free agent.
The Minnesota Twins signed T.R. Bryden as a free agent.
The Minnesota Twins signed Bryan Clark as a free agent.
The Montreal Expos signed Dave Engle as a free agent.
The Chicago White Sox signed Dave Gallagher as a free agent.
The Kansas City Royals signed Gene Garber as a free agent.
The Oakland Athletics signed Gary Lavelle as a free agent.
The Montreal Expos signed Bob McClure as a free agent.
The Minnesota Twins signed Don Schulze as a free agent.
The Chicago White Sox signed Dar Smith as a free agent.
The Chicago Cubs signed Manny Trillo as a free agent.
- December 8, 1987
The St. Louis Cardinals drafted Gibson Alba from the Milwaukee Brewers in the 1987 minor league draft.
The Milwaukee Brewers drafted Matías Carrillo from the Pittsburgh Pirates in the 1987 minor league draft.
The Chicago White Sox drafted Rodney McCray from the San Diego Padres in the 1987 minor league draft.
The Cleveland Indians drafted Todd Pratt from the Boston Red Sox in the 1987 minor league draft.
The Detroit Tigers signed Dave Beard as a free agent.
The Cincinnati Reds signed Dave Collins as a free agent.
The Philadelphia Phillies signed Bob Dernier as a free agent.
The Texas Rangers signed Craig McMurtry as a free agent.
The Atlanta Braves traded Rafael Ramírez and cash to the Houston Astros for Mike Stoker (minors) and Ed Whited.
The Baltimore Orioles traded a player to be named later and Blaine Beatty to the New York Mets for Doug Sisk. The Baltimore Orioles sent Greg Talamantez (minors) (December 11, 1987) to the New York Mets to complete the trade.
The Boston Red Sox traded Al Nipper and Calvin Schiraldi to the Chicago Cubs for Lee Smith.
The Cincinnati Reds traded Dave Parker to the Oakland Athletics for Tim Birtsas and José Rijo.
- December 9, 1987
The Oakland Athletics signed Ron Hassey as a free agent.
The Oakland Athletics signed Ross Jones as a free agent.
The Chicago White Sox signed Sap Randall as a free agent.
The Baltimore Orioles traded Ken Dixon to the Seattle Mariners for Mike Morgan.
The Philadelphia Phillies traded Dave Brundage (minors), Mike Jackson and Glenn Wilson to the Seattle Mariners for Phil Bradley and Tim Fortugno.
- December 10, 1987
The Chicago White Sox traded Floyd Bannister and Dave Cochrane to the Kansas City Royals for Chuck Mount (minors), John Davis, Greg Hibbard and Melido Perez.
- December 11, 1987
The New York Mets signed Ken Dowell as a free agent.
The New York Mets traded Victor Garcia (minors) and Rafael Santana to the New York Yankees for Steve Frey, Phil Lombardi and Darren Reed.
As part of a 3-team trade: The New York Mets sent Jesse Orosco to the Los Angeles Dodgers. The Los Angeles Dodgers sent Bob Welch and Matt Young to the Oakland Athletics. The Los Angeles Dodgers sent Jack Savage to the New York Mets. The Oakland Athletics sent Alfredo Griffin and Jay Howell to the Los Angeles Dodgers. The Oakland Athletics sent Kevin Tapani and Wally Whitehurst to the New York Mets.
- December 12, 1987
The Oakland Athletics traded José Tolentino to the Texas Rangers for Tom Duggan (minors) and Kirk Killingsworth (minors).
- December 13, 1987
The Texas Rangers signed Bárbaro Garbey as a free agent.
The Chicago White Sox released Mike Brown.
- December 14, 1987
The Milwaukee Brewers signed Mark Clear as a free agent.
The Detroit Tigers signed Larry Herndon as a free agent.
The Chicago Cubs signed Vance Law as a free agent.
The San Francisco Giants signed Joe Price as a free agent.
The Boston Red Sox traded Marc Sullivan to the Houston Astros for Randy Randle (minors).
- December 15, 1987
The Los Angeles Dodgers signed Mike Davis as a free agent.
The Oakland Athletics signed Marcos Armas as an amateur free agent.
Bill Caudill of the Oakland Athletics granted free agency.
Reggie Jackson of the Oakland Athletics granted free agency.
The Kansas City Royals released Lonnie Smith.
- December 16, 1987
The Houston Astros signed Pat Keedy as a free agent.
The Montreal Expos signed Bryn Smith as a free agent.
The Kansas City Royals signed Hipólito Pichardo as an amateur free agent.
The Los Angeles Dodgers released Glenn Hoffman.
- December 17, 1987
The New York Mets signed Lee Mazzilli as a free agent.
- December 18, 1987
The Kansas City Royals signed Nick Capra as a free agent.
The Baltimore Orioles signed Kevin Hickey as a free agent.
The Montreal Expos signed Rex Hudler as a free agent.
The Montreal Expos signed Dennis Martínez as a free agent.
The Philadelphia Phillies signed David Palmer as a free agent.
The New York Yankees released Rich Bordi.
- December 21, 1987
The Oakland Athletics signed Dave Henderson as a free agent.
The New York Yankees signed Tommy John as a free agent.
The Kansas City Royals released Steve Balboni.
The Chicago Cubs released Jay Baller.
The Minnesota Twins released Don Baylor.
The Oakland Athletics released Tony Bernazard.
The Houston Astros released Buddy Biancalana.
The Minnesota Twins released Sal Butera.
The Minnesota Twins released Steve Carlton.
The California Angels released Stew Cliburn.
The St. Louis Cardinals released Bill Dawley.
The New York Yankees released Mike Easler.
The St. Louis Cardinals released Bob Forsch.
The Texas Rangers released Greg Harris.
The Chicago White Sox released Bob James.
The New York Yankees released Ron Kittle.
The Seattle Mariners released John Moses.
The San Francisco Giants released Phil Ouellette.
The Oakland Athletics released Tony Phillips.
The Texas Rangers released Darrell Porter.
The Seattle Mariners released Domingo Ramos.
The Oakland Athletics released Rick Rodriguez.
The Minnesota Twins released Dan Schatzeder.
The Minnesota Twins released Mike Smithson.
The Baltimore Orioles released Ron Washington.
- December 22, 1987
The Minnesota Twins signed Juan Berenguer as a free agent.
The California Angels signed Ray Krawczyk as a free agent.
The California Angels signed Mike Witt as a free agent.
The New York Yankees traded Henry Cotto and Steve Trout to the Seattle Mariners for Lee Guetterman, Clay Parker and Wade Taylor.
- December 23, 1987
The New York Yankees signed Dave Righetti as a free agent.
The Oakland Athletics signed Brian Snyder as a free agent.
The Los Angeles Dodgers traded Scott May to the Texas Rangers for Javier Ortiz.
- December 24, 1987
The Chicago White Sox signed Kelly Paris as a free agent.
- December 28, 1987
The Cleveland Indians signed Ron Washington as a free agent.
- December 29, 1987
The Houston Astros signed Luis DeLeón as a free agent.
The Detroit Tigers signed Jack Morris as a free agent.
The Minnesota Twins signed Rich Garcés as an amateur free agent.
- December 30, 1987
The Detroit Tigers signed Mike Brown as a free agent.
- Before 1988 Season
The California Angels released Ray Chadwick.
Darryl Motley sent from ??? to the California Angels in an unknown transaction.
Bryan Oelkers sent from the Cleveland Indians to ??? in an unknown transaction.
Dwight Taylor sent from the Kansas City Royals to the Montreal Expos in an unknown transaction.
George Wright sent from the Montreal Expos to ??? in an unknown transaction.
- January, 1988
The Minnesota Twins signed Victor Rodriguez as a free agent.
- January 1, 1988
The Los Angeles Dodgers signed Bill Krueger as a free agent.
The Cleveland Indians signed Bill Laskey as a free agent.
- January 4, 1988
The Minnesota Twins signed Brian Harper as a free agent.
The St. Louis Cardinals signed Bob Horner as a free agent.
- January 5, 1988
The Kansas City Royals signed Thad Bosley as a free agent.
The Minnesota Twins signed Sal Butera as a free agent.
The Boston Red Sox signed Dennis Lamp as a free agent.
The Milwaukee Brewers signed Paul Molitor as a free agent.
The Cincinnati Reds signed Ron Roenicke as a free agent.
The Oakland Athletics signed Matt Sinatro as a free agent.
The Los Angeles Dodgers signed Don Sutton as a free agent.
- January 6, 1988
The New York Yankees signed Jack Clark as a free agent.
- January 7, 1988
The Minnesota Twins signed Gary Gaetti as a free agent.
The Kansas City Royals signed Charlie Leibrandt as a free agent.
The Montreal Expos signed Carlos Pérez as an amateur free agent.
- January 8, 1988
The New York Mets signed Bill Almon as a free agent.
The Houston Astros signed Larry Andersen as a free agent.
The Houston Astros signed Joaquín Andújar as a free agent.
The Houston Astros signed Danny Darwin as a free agent.
The San Francisco Giants signed Atlee Hammaker as a free agent.
The Houston Astros signed Dave Smith as a free agent.
The Cleveland Indians signed Paul Zuvella as a free agent.
- January 11, 1988
The Seattle Mariners signed Brian Giles as a free agent.
The Oakland Athletics signed Glenn Hubbard as a free agent.
- January 12, 1988
The Milwaukee Brewers released Cecil Cooper.
- January 14, 1988
The Oakland Athletics signed Orlando Mercado as a free agent.
- January 15, 1988
The New York Yankees signed John Candelaria as a free agent.
The Cleveland Indians signed Rick Rodriguez as a free agent.
- January 18, 1988
The Milwaukee Brewers signed Jim Adduci as a free agent.
The Boston Red Sox signed Mike Smithson as a free agent.
The Cincinnati Reds signed Lary Sorensen as a free agent.
The Minnesota Twins signed Kelvin Torve as a free agent.
- January 19, 1988
The Cleveland Indians signed Greg Harris as a free agent.
The Texas Rangers signed Steve Kemp as a free agent.
The Cleveland Indians signed John Moses as a free agent.
The Seattle Mariners signed John Rabb as a free agent.
The Milwaukee Brewers signed Ronn Reynolds as a free agent.
The Texas Rangers released Steve Howe.
The Chicago White Sox traded Darrell Pruitt (minors) to the Cincinnati Reds for Carl Willis.
- January 20, 1988
The Pittsburgh Pirates signed Dave Hostetler as a free agent.
- January 22, 1988
The Chicago White Sox signed Jeff Bittiger as a free agent.
The California Angels signed Stew Cliburn as a free agent.
Juan Beníquez of the Toronto Blue Jays granted free agency.
Tom Brookens of the Detroit Tigers granted free agency.
Carlton Fisk of the Chicago White Sox granted free agency.
Kirk Gibson of the Detroit Tigers granted free agency.
Donnie Moore of the California Angels granted free agency.
Joe Niekro of the Minnesota Twins granted free agency.
Butch Wynegar of the California Angels granted free agency.
- January 24, 1988
The Cleveland Indians signed Roberto Rivera as an amateur free agent.
- January 25, 1988
The Toronto Blue Jays signed Juan Beníquez as a free agent.
The Kansas City Royals signed Jamie Quirk as a free agent.
- January 26, 1988
The Toronto Blue Jays signed Graeme Lloyd as an amateur free agent.
- January 27, 1988
The Atlanta Braves signed Juan Eichelberger as a free agent.
The St. Louis Cardinals signed Bob Forsch as a free agent.
The Baltimore Orioles signed Bill Scherrer as a free agent.
- January 28, 1988
The San Francisco Giants signed Phil Garner as a free agent.
- January 29, 1988
The Oakland Athletics signed Rich Bordi as a free agent.
The Minnesota Twins signed Steve Carlton as a free agent.
The Los Angeles Dodgers signed Kirk Gibson as a free agent.
The Cincinnati Reds signed Ron Oester as a free agent.
The Chicago White Sox signed José Segura as a free agent.
The Houston Astros signed Jim Weaver as a free agent.
- February, 1988
The Baltimore Orioles signed Max Venable as a free agent.
- February 1, 1988
The Cleveland Indians signed Domingo Ramos as a free agent.
The St. Louis Cardinals signed Duane Walker as a free agent.
- February 2, 1988
The Chicago White Sox signed Ravelo Manzanillo as a free agent.
The Texas Rangers signed Ed Vande Berg as a free agent.
The Texas Rangers released Larry McWilliams.
- February 3, 1988
The Minnesota Twins signed Tim Laudner as a free agent.
The Cleveland Indians signed Doug Piatt as an amateur free agent.
The Kansas City Royals traded Dave Cochrane to the Seattle Mariners for Ken Spratke (minors).
- February 4, 1988
The Minnesota Twins signed Charlie Lea as a free agent.
The Baltimore Orioles signed Manny Alexander as an amateur free agent.
- February 5, 1988
The Minnesota Twins traded Chris Calvert (minors) to the Philadelphia Phillies for Freddie Toliver.
- February 6, 1988
The Baltimore Orioles signed César Devarez as an amateur free agent.
- February 9, 1988
The Oakland Athletics signed Don Baylor as a free agent.
The Detroit Tigers signed Tom Brookens as a free agent.
The Chicago White Sox signed Carlton Fisk as a free agent.
The Cleveland Indians signed Ron Kittle as a free agent.
The Chicago White Sox signed Dave LaPoint as a free agent.
The California Angels signed Donnie Moore as a free agent.
The Minnesota Twins signed Joe Niekro as a free agent.
The Pittsburgh Pirates signed Dave Rucker as a free agent.
The Cleveland Indians signed Dan Schatzeder as a free agent.
The California Angels signed Butch Wynegar as a free agent.
The Chicago White Sox traded José DeLeón to the St. Louis Cardinals for Ricky Horton, Lance Johnson and cash.
- February 10, 1988
The Philadelphia Phillies signed Bill Dawley as a free agent.
The Cincinnati Reds signed Eddie Milner as a free agent.
- February 11, 1988
The Montreal Expos traded Bob Sudo (minors) to the St. Louis Cardinals for Marty Pevey.
- February 12, 1988
The St. Louis Cardinals signed Larry McWilliams as a free agent.
The Chicago Cubs traded Mike Brumley and Keith Moreland to the San Diego Padres for Rich Gossage and Ray Hayward.
- February 15, 1988
The Cincinnati Reds traded Jeff Montgomery to the Kansas City Royals for Van Snider.
- February 16, 1988
The Baltimore Orioles traded Rick Carriger (minors), Doug Cinnella (minors) and John Hoover to the Montreal Expos for Al Cardwood (minors) and Jay Tibbs.
- February 17, 1988
The Chicago Cubs signed Jay Baller as a free agent.
The Detroit Tigers signed Frank Tanana as a free agent.
The Montreal Expos signed Alberto Reyes as an amateur free agent.
- February 18, 1988
The Kansas City Royals signed Steve Balboni as a free agent.
The San Diego Padres signed Dickie Thon as a free agent.
The Oakland Athletics signed Johnny Guzman as an amateur free agent.
- February 20, 1988
The Detroit Tigers signed Luis Salazar as a free agent.
- February 22, 1988
The Cleveland Indians signed Chris Codiroli as a free agent.
The Toronto Blue Jays signed Mark Ross as a free agent.
- February 24, 1988
The Detroit Tigers traded Doug Baker to the Minnesota Twins for Julius McDougal (minors).
- February 25, 1988
The New York Yankees signed José Cruz as a free agent.
- February 27, 1988
The Baltimore Orioles traded Ray Knight to the Detroit Tigers for Mark Thurmond.
- February 28, 1988
The Cleveland Indians signed Terry Francona as a free agent.
- February 29, 1988
The Montreal Expos signed Miguel Batista as an amateur free agent.
- March, 1988
The Minnesota Twins released Bryan Clark.
The Baltimore Orioles released Max Venable.
The Chicago Cubs released Jay Baller.
The Seattle Mariners signed Jay Baller as a free agent.
- March 1, 1988
The Seattle Mariners signed Jim Wilson as a free agent.
- March 5, 1988
The Montreal Expos signed Otis Nixon as a free agent.
- March 9, 1988
The Oakland Athletics signed Tony Phillips as a free agent.
- March 10, 1988
The Houston Astros signed Ernie Camacho as a free agent.
The Houston Astros signed Steve Henderson as a free agent.
The Boston Red Sox signed Glenn Hoffman as a free agent.
The Oakland Athletics signed Manny Martínez as an amateur free agent.
- March 12, 1988
The Atlanta Braves signed Lonnie Smith as a free agent.
- March 17, 1988
The Cleveland Indians released Mark Huismann.
The Chicago Cubs traded Ray Hayward to the Texas Rangers for Dave Meier and Greg Tabor.
- March 18, 1988
The Minnesota Twins released Sal Butera.
- March 19, 1988
The Los Angeles Dodgers released Ron Davis.
The San Francisco Giants traded Rod Scurry to the Seattle Mariners for a player to be named later. The Seattle Mariners sent Donell Nixon (June 23, 1988) to the San Francisco Giants to complete the trade.
- March 20, 1988
The New York Mets signed Héctor Carrasco as an amateur free agent.
The Kansas City Royals released Tom Gilles.
- March 21, 1988
The Chicago Cubs released Mike Mason.
The New York Mets traded Bill Almon to the Philadelphia Phillies for Vladimir Perez (minors) and Shawn Barton.
The Baltimore Orioles traded a player to be named later and Mike Young to the Philadelphia Phillies for Keith Hughes, Rick Schu and Jeff Stone. The Baltimore Orioles sent Frank Bellino (minors) (June 14, 1988) to the Philadelphia Phillies to complete the trade.
- March 23, 1988
The Detroit Tigers signed Mark Huismann as a free agent.
The Seattle Mariners released Chris Beasley.
The Baltimore Orioles released Jackie Gutiérrez.
The Oakland Athletics traded Rod Beck to the San Francisco Giants for Charlie Corbell (minors).
- March 24, 1988
The Toronto Blue Jays signed Sal Butera as a free agent.
The Montreal Expos purchased Graig Nettles from the Atlanta Braves.
The Cleveland Indians released Greg Harris.
The Detroit Tigers traded Balvino Gálvez to the Minnesota Twins for Billy Beane.
- March 25, 1988
The Cleveland Indians purchased Willie Upshaw from the Toronto Blue Jays.
The Cleveland Indians released Bernardo Brito.
The Chicago White Sox released Jerry Hairston.
The Chicago White Sox released Ray Searage.
The Chicago White Sox released Jim Winn.
The Houston Astros traded Robbie Wine to the Texas Rangers for Mike Loynd.
- March 26, 1988
The Philadelphia Phillies released Doug Bair.
The New York Mets traded Scott Henion (minors) and Randy Milligan to the Pittsburgh Pirates for Tim Drummond and Mackey Sasser.
- March 28, 1988
The Cleveland Indians returned Todd Pratt (earlier draft pick) to the Boston Red Sox.
The Baltimore Orioles released Chris Bushing.
The Cincinnati Reds released Angel Salazar.
The Cincinnati Reds released Lary Sorensen.
The Oakland Athletics released Mickey Tettleton.
The Seattle Mariners released Mike Trujillo.
The Detroit Tigers traded Karl Best to the Minnesota Twins for Don Schulze.
The Atlanta Braves traded Jeff Dedmon to the Cleveland Indians for a player to be named later. The Cleveland Indians sent Tommy Kurczewski (minors) (June 22, 1988) to the Atlanta Braves to complete the trade.
- March 29, 1988
The Detroit Tigers returned John Wetteland (earlier draft pick) to the Los Angeles Dodgers.
The Chicago White Sox signed Jerry Reuss as a free agent.
The New York Yankees released Pete Filson.
The Cincinnati Reds released Guy Hoffman.
The Philadelphia Phillies released Garland Kiser.
The Cleveland Indians released John Moses.
The San Francisco Giants released Jon Perlman.
The California Angels released Mark Ryal.
The Texas Rangers released Ed Vande Berg.
The Cleveland Indians released Frank Wills.
The Baltimore Orioles traded Tom Michno (minors) and Nick Ramirez (minors) to the Chicago Cubs for Wade Rowdon.
- March 30, 1988
The Los Angeles Dodgers signed Rick Dempsey as a free agent.
The California Angels traded Ted Milner (minors) to the Cleveland Indians for Junior Noboa.
The New York Yankees traded Orestes Destrade to the Pittsburgh Pirates for Hipólito Peña.
- March 31, 1988
The Minnesota Twins signed Bernardo Brito as a free agent.
The Chicago Cubs signed Angel Salazar as a free agent.
The Detroit Tigers signed Mike Trujillo as a free agent.
The Chicago Cubs traded Mike Curtis (minors) to the Pittsburgh Pirates for Mike Bielecki.
The Minnesota Twins traded Joe Klink to the Oakland Athletics for a player to be named later. The Oakland Athletics sent Russ Kibler (minors) (June 25, 1988) to the Minnesota Twins to complete the trade.
- April 1, 1988
The Philadelphia Phillies signed Greg Harris as a free agent.
The Chicago Cubs traded Luis Quiñones to the Cincinnati Reds for Bill Landrum.
The Los Angeles Dodgers traded Craig Shipley to the New York Mets for John Gibbons.
The transaction information used here was obtained free of charge from and is copyrighted by RetroSheet. We attempt to update transactions throughout the season.
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