All Transactions
Transactions listed are from November 1 of previous year to April 1 of the following year.
- November 4, 1969
The Philadelphia Phillies released Turk Farrell.
- November 5, 1969
The Cincinnati Reds traded George Culver to the St. Louis Cardinals for Ray Washburn.
- November 7, 1969
The Boston Red Sox signed Ramón Avilés as an amateur free agent.
- November 14, 1969
The Cincinnati Reds signed Joaquín Andújar as an amateur free agent.
- November 17, 1969
The Chicago Cubs traded Oscar Gamble and Dick Selma to the Philadelphia Phillies for a player to be named later and Johnny Callison. The Philadelphia Phillies sent Larry Colton (January, 1970) to the Chicago Cubs to complete the trade.
- November 19, 1969
The Houston Astros signed Juan Jiménez as an amateur free agent.
- November 20, 1969
The Montreal Expos signed Pepe Mangual as an amateur free agent.
The Houston Astros returned Ron Willis to the St. Louis Cardinals following previous purchase.
- November 21, 1969
The Houston Astros purchased Mike Marshall from the Milwaukee Brewers.
The Milwaukee Brewers purchased Wayne Twitchell from the Houston Astros.
The Cleveland Indians traded José Cardenal to the St. Louis Cardinals for Vada Pinson.
- November 24, 1969
The Milwaukee Brewers released Jim Pagliaroni.
- November 25, 1969
The Philadelphia Phillies purchased Fred Wenz from the Boston Red Sox.
The California Angels traded Pedro Borbón, Vern Geishert and Jim McGlothlin to the Cincinnati Reds for Alex Johnson and Chico Ruiz.
- November 26, 1969
The California Angels purchased Paul Doyle from the Atlanta Braves.
- December 1, 1969
The Chicago Cubs drafted Jim Cosman from the New York Mets in the 1969 rule 5 draft.
The Boston Red Sox drafted Mike Derrick from the Detroit Tigers in the 1969 rule 5 draft.
The Houston Astros drafted Jack DiLauro from the New York Mets in the 1969 rule 5 draft.
The Milwaukee Brewers drafted Roy Foster from the New York Mets in the 1969 rule 5 draft.
The Minnesota Twins drafted Hal Haydel from the San Francisco Giants in the 1969 rule 5 draft.
The Chicago Cubs drafted Cleo James from the Los Angeles Dodgers in the 1969 rule 5 draft.
The St. Louis Cardinals drafted Jim Kennedy from the New York Yankees in the 1969 rule 5 draft.
The Atlanta Braves drafted Hal King from the Boston Red Sox in the 1969 rule 5 draft.
The Los Angeles Dodgers drafted José Peña from the Cincinnati Reds in the 1969 rule 5 draft.
The St. Louis Cardinals drafted Milt Ramírez from the Baltimore Orioles in the 1969 rule 5 draft.
The Chicago White Sox drafted Gene Rounsaville from the Philadelphia Phillies in the 1969 rule 5 draft.
The San Francisco Giants drafted Mike Sadek from the Minnesota Twins in the 1969 rule 5 draft.
The Baltimore Orioles drafted Tom Shopay from the New York Yankees in the 1969 rule 5 draft.
The Montreal Expos drafted John Strohmayer from the Oakland Athletics in the 1969 rule 5 draft.
The Oakland Athletics drafted Manny Trillo from the Philadelphia Phillies in the 1969 rule 5 draft.
The Montreal Expos drafted Freddie Velázquez from the Oakland Athletics in the 1969 rule 5 draft.
The Kansas City Royals drafted Ken Wright from the Boston Red Sox in the 1969 rule 5 draft.
The Milwaukee Brewers drafted Don Bryant from the Houston Astros in the 1969 minor league draft.
The New York Mets drafted Bill Denehy from the Cleveland Indians in the 1969 minor league draft.
The Milwaukee Brewers drafted John Felske from the Chicago Cubs in the 1969 minor league draft.
The Kansas City Royals drafted Aurelio Monteagudo from the St. Louis Cardinals in the 1969 minor league draft.
The Washington Senators purchased Bob Schroder from the San Francisco Giants.
- December 2, 1969
The Chicago Cubs purchased Adrian Garrett from the Philadelphia Phillies.
The Atlanta Braves purchased Vic LaRose from the Chicago Cubs.
The Houston Astros purchased Dan Osinski from the Chicago White Sox.
The Atlanta Braves released Seth Morehead. (Date given is approximate. Exact date is uncertain.)
The Milwaukee Brewers traded Gary Upton (minors) to the New York Mets for Bernie Smith.
The Atlanta Braves traded Donald Johnson (minors) and Jim Britton to the Montreal Expos for Larry Jaster.
- December 3, 1969
The Atlanta Braves traded Felipe Alou to the Oakland Athletics for Jim Nash.
The Kansas City Royals traded Joe Foy to the New York Mets for Bob Johnson and Amos Otis.
The Detroit Tigers traded Joe Sparma to the Montreal Expos for Jerry Robertson.
- December 4, 1969
The Houston Astros traded Curt Blefary to the New York Yankees for Joe Pepitone.
The Milwaukee Brewers traded George Brunet to the Washington Senators for Dave Baldwin.
The Detroit Tigers traded Dave Campbell and Pat Dobson to the San Diego Padres for Joe Niekro.
The Chicago Cubs traded Rich Nye to the St. Louis Cardinals for Boots Day.
- December 5, 1969
The St. Louis Cardinals purchased Bill Dillman from the Baltimore Orioles.
The Oakland Athletics purchased Mudcat Grant from the St. Louis Cardinals.
The New York Yankees traded Al Downing and Frank Fernández to the Oakland Athletics for Danny Cater and Ossie Chavarria.
The Cleveland Indians traded Ron Law, Dave Nelson and Horacio Piña to the Washington Senators for Dennis Higgins and Barry Moore.
The San Diego Padres traded Frank Reberger to the San Francisco Giants for Bob Barton, Bobby Etheridge and Ron Herbel.
- December 7, 1969
The Milwaukee Brewers traded Ray Oyler and Diego Seguí to the Oakland Athletics for Ted Kubiak and George Lauzerique.
- December 10, 1969
The Cleveland Indians traded Luis Tiant and Stan Williams to the Minnesota Twins for Dean Chance, Bob Miller, Graig Nettles and Ted Uhlaender.
- December 12, 1969
The California Angels released Error. (Date given is approximate. Exact date is uncertain.)
The New York Mets traded Jim Gosger and Bob Heise to the San Francisco Giants for Dave Marshall and Ray Sadecki.
The Milwaukee Brewers traded Dick Simpson and Steve Whitaker to the San Francisco Giants for Bobby Bolin.
- December 13, 1969
The Boston Red Sox traded Dalton Jones to the Detroit Tigers for Tommy Matchick.
The Boston Red Sox traded Billy Farmer (minors) and Syd O'Brien to the Chicago White Sox for Don Pavletich and Gary Peters. The Boston Red Sox sent Gerry Janeski (March 9, 1970) to the Chicago White Sox to complete the trade.
- December 15, 1969
The Washington Senators released Cal Neeman. (Date given is approximate. Exact date is uncertain.)
The Chicago White Sox traded Ángel Bravo to the Cincinnati Reds for Gerry Arrigo.
- December 16, 1969
The Cincinnati Reds traded Jim Beauchamp to the Houston Astros for Pat House and Dooley Womack.
- December 18, 1969
The Chicago White Sox traded Pete Ward to the New York Yankees for Mickey Scott and cash.
- December 23, 1969
The New York Yankees signed Otto Vélez as an amateur free agent.
- December 31, 1969
The Washington Senators signed John Roseboro as a free agent.
- Before 1970 Season
The Cincinnati Reds signed Santo Alcalá as an amateur free agent.
The Los Angeles Dodgers signed Orlando Álvarez as an amateur free agent.
The Boston Red Sox signed Dave Coleman as an amateur free agent.
The Pittsburgh Pirates signed Lafayette Currence as an amateur free agent.
The New York Mets signed Greg Harts as an amateur free agent.
The Montreal Expos signed Don Hopkins as an amateur free agent.
The Minnesota Twins signed Tom Johnson as an amateur free agent.
The New York Mets signed Brian Ostrosser as an amateur free agent.
The New York Yankees signed Dave Pagan as an amateur free agent.
The Pittsburgh Pirates signed Jim Sadowski as an amateur free agent.
The Houston Astros signed José Sosa as an amateur free agent.
The Cincinnati Reds signed Tom Spencer as an amateur free agent.
The Detroit Tigers signed Joe Staton as an amateur free agent.
The Philadelphia Phillies released Doc Edwards.
The Cleveland Indians released Tom Kelley.
The Boston Red Sox released Ron Kline.
The Cincinnati Reds released Fred Whitfield.
The Los Angeles Dodgers traded Bruce Brubaker to the Milwaukee Brewers for Jerry Stephenson.
Ed Acosta sent from the Houston Astros to the Pittsburgh Pirates in an unknown transaction.
Bill Faul sent from the Kansas City Royals to the San Francisco Giants in an unknown transaction.
Juan Jiménez sent from the Houston Astros to the Philadelphia Phillies in an unknown transaction.
Ron Piché sent from the Chicago Cubs to the New York Yankees in an unknown transaction.
Leroy Reams sent from the Philadelphia Phillies to the Detroit Tigers in an unknown transaction.
Ron Tompkins sent from the Kansas City Royals to the Atlanta Braves in an unknown transaction.
Bobby Treviño sent from the California Angels to Mexico City Reds (Mexican) in an unknown transaction.
- January, 1970
Hawaii (PCL) purchased Rich Barry from the Philadelphia Phillies.
- January 6, 1970
The Chicago Cubs traded a player to be named later, Terry Bongiovanni (minors) and cash to the New York Yankees for Jimmie Hall. The Chicago Cubs sent Rick Bladt (January 6, 1970) to the New York Yankees to complete the trade.
- January 7, 1970
The San Diego Padres purchased Aurelio Monteagudo from the Kansas City Royals.
- January 14, 1970
The St. Louis Cardinals purchased Jim Campbell from the Baltimore Orioles.
The California Angels traded Daniel Loomer (minors) and Bill Harrelson to the Cincinnati Reds for Jack Fisher.
- January 15, 1970
The Milwaukee Brewers traded Ron Clark and Don Mincher to the Oakland Athletics for Mike Hershberger, Lew Krausse, Phil Roof and Ken Sanders.
- January 17, 1970
The Cleveland Indians drafted Chris Chambliss in the 1st round (1st pick) of the 1970 amateur draft (January).
The Washington Senators drafted Bill Fahey in the 1st round (1st pick) of the 1970 amateur draft (January Secondary).
The San Diego Padres drafted John Scott in the 1st round (2nd pick) of the 1970 amateur draft (January).
The San Francisco Giants drafted Chris Speier in the 1st round (2nd pick) of the 1970 amateur draft (January Secondary).
The Boston Red Sox drafted Rick Burleson in the 1st round (5th pick) of the 1970 amateur draft (January Secondary).
The Chicago White Sox drafted Duane Kuiper in the 1st round (5th pick) of the 1970 amateur draft (January), but was not signed.
The St. Louis Cardinals drafted Bucky Dent in the 1st round (6th pick) of the 1970 amateur draft (January Secondary), but was not signed.
The California Angels drafted John Doherty in the 1st round (7th pick) of the 1970 amateur draft (January Secondary).
The Oakland Athletics drafted Vic Harris in the 1st round (9th pick) of the 1970 amateur draft (January Secondary). Player signed May 9, 1970.
The Los Angeles Dodgers drafted John LaRose in the 1st round (10th pick) of the 1970 amateur draft (January Secondary), but was not signed.
The Baltimore Orioles drafted Mike Reinbach in the 1st round (17th pick) of the 1970 amateur draft (January Secondary).
The San Francisco Giants drafted Randy Moffitt in the 1st round (18th pick) of the 1970 amateur draft (January).
The Chicago Cubs drafted Pete LaCock in the 1st round (20th pick) of the 1970 amateur draft (January). Player signed February 17, 1970.
The New York Mets drafted Roy Staiger in the 1st round (24th pick) of the 1970 amateur draft (January Secondary).
The Houston Astros drafted Mike Cosgrove in the 2nd round of the 1970 amateur draft (January Secondary).
The Baltimore Orioles drafted Jim Fuller in the 2nd round of the 1970 amateur draft (January Secondary).
The California Angels drafted Morris Nettles in the 2nd round of the 1970 amateur draft (January).
The Atlanta Braves drafted Jack Pierce in the 2nd round of the 1970 amateur draft (January).
The Cincinnati Reds drafted Joel Youngblood in the 2nd round of the 1970 amateur draft (January).
The San Diego Padres drafted Doug Ault in the 2nd round of the 1970 amateur draft (January Secondary), but was not signed.
The Baltimore Orioles drafted Doug DeCinces in the 3rd round of the 1970 amateur draft (January Secondary).
The Kansas City Royals drafted Greg Minton in the 3rd round of the 1970 amateur draft (January).
The St. Louis Cardinals drafted Mike Tyson in the 3rd round of the 1970 amateur draft (January).
The Kansas City Royals drafted Jim Wohlford in the 3rd round of the 1970 amateur draft (January Secondary).
The Washington Senators drafted Mardie Cornejo in the 3rd round of the 1970 amateur draft (January), but was not signed.
The Detroit Tigers drafted Mike Potter in the 3rd round of the 1970 amateur draft (January), but was not signed.
The St. Louis Cardinals drafted Rudy Arroyo in the 4th round of the 1970 amateur draft (January Secondary).
The Los Angeles Dodgers drafted Mike Barlow in the 4th round of the 1970 amateur draft (January Secondary), but was not signed.
The Oakland Athletics drafted Mitchell Page in the 4th round of the 1970 amateur draft (January), but was not signed.
The Chicago White Sox drafted John Tamargo in the 4th round of the 1970 amateur draft (January Secondary), but was not signed.
The Washington Senators drafted Bill Madlock in the 5th round of the 1970 amateur draft (January Secondary). Player signed May 25, 1970.
The Chicago Cubs drafted Chuck Seelbach in the 5th round of the 1970 amateur draft (January Secondary), but was not signed.
The Minnesota Twins drafted Glenn Borgmann in 1970, but pick was voided.
The Minnesota Twins drafted Jim Barr in the 6th round of the 1970 amateur draft (January Secondary), but was not signed.
The Oakland Athletics drafted Mark Wiley in 1970, but pick was voided.
- January 22, 1970
The St. Louis Cardinals signed Héctor Cruz as an amateur free agent.
- January 28, 1970
The Philadelphia Phillies traded Michael Everett (minors) and Dave Bennett to the Pittsburgh Pirates for Del Bates.
- January 30, 1970
The Philadelphia Phillies released Paul Brown. (Date given is approximate. Exact date is uncertain.)
- February 4, 1970
The Cincinnati Reds traded Dennis Ribant to the Pittsburgh Pirates for Bo Belinsky.
- February 18, 1970
The Cincinnati Reds traded Steve Mingori to the Cleveland Indians for Jay Ward.
- February 21, 1970
The San Francisco Giants signed Ed Figueroa as a free agent.
- February 28, 1970
The New York Yankees purchased Ron Hansen from the Chicago White Sox.
- March, 1970
The Washington Senators purchased Ron Theobald from the Minnesota Twins.
- March 21, 1970
The Minnesota Twins traded Joe Grzenda and Charlie Walters to the Washington Senators for Brant Alyea.
- March 24, 1970
The Chicago Cubs released Al Spangler.
The Oakland Athletics traded Ramon Webster to the San Diego Padres for Roberto Peña.
- March 26, 1970
The Atlanta Braves returned Bobby Mitchell to the New York Yankees as part of a conditional deal.
- March 29, 1970
The Chicago Cubs traded Randy Bobb to the New York Mets for J.C. Martin.
- March 30, 1970
The Washington Senators signed Pedro Ramos as a free agent.
The Chicago White Sox traded Jerry Nyman to the San Diego Padres for Tommie Sisk.
- March 31, 1970
The St. Louis Cardinals released Ramón Hernández.
- April 1, 1970
The Milwaukee Brewers released Steve Barber.
- April 2, 1970
The Montreal Expos signed Fred Whitfield as a free agent.
Hawaii (Pacific Coast) purchased Gary Kroll from the Cleveland Indians.
The San Diego Padres traded Billy McCool to the St. Louis Cardinals for Steve Huntz.
- April 3, 1970
The Milwaukee Brewers returned Don Bryant (earlier draft pick) to the Houston Astros.
- April 4, 1970
The San Francisco Giants purchased Russ Gibson from the Boston Red Sox.
The Cleveland Indians traded Max Alvis and Russ Snyder to the Milwaukee Brewers for Frank Coggins, Roy Foster and cash.
- April 5, 1970
The Milwaukee Brewers purchased Ted Savage from the Cincinnati Reds.
The San Diego Padres returned Aurelio Monteagudo to the Kansas City Royals following previous purchase.
- April 6, 1970
The Montreal Expos purchased Jack Hiatt from the San Francisco Giants.
The Montreal Expos purchased Tom Robson from the New York Mets.
The California Angels released Chuck Cottier.
The Kansas City Royals released Orlando Peña.
The Washington Senators released Zoilo Versalles.
The Minnesota Twins released Darrell Brandon.
The Chicago White Sox signed Darrell Brandon as a free agent.
- April 7, 1970
The California Angels released Jack Fisher.
The Baltimore Orioles released Larry Milbourne.
- April 8, 1970
The Detroit Tigers released Tom Tresh.
The St. Louis Cardinals traded to the Philadelphia Phillies for unknown compensation. Curt Flood refused to report to his new team. The St. Louis Cardinals sent Willie Montañez (April 8, 1970) and Jim Browning (minors) (August 30, 1970) to the Philadelphia Phillies to complete the trade.
The Chicago Cubs released Ken Johnson.
The Montreal Expos signed Ken Johnson as a free agent.
- April 9, 1970
The Baltimore Orioles purchased Jimmie Schaffer from the Los Angeles Dodgers.
- April 10, 1970
The Philadelphia Phillies traded Ron Allen to the New York Mets for a player to be named later. The New York Mets sent Bobby Pfeil (May 26, 1970) to the Philadelphia Phillies to complete the trade.
- April 12, 1970
The Chicago Cubs released Jesús Hernáiz.
- April 13, 1970
The Philadelphia Phillies signed Rubén Amaro Sr. as a free agent.
The Kansas City Royals purchased John Sullivan from the Baltimore Orioles.
The Cincinnati Reds released Al Jackson.
The Cincinnati Reds released Camilo Pascual.
The Los Angeles Dodgers signed Camilo Pascual as a free agent.
- April 15, 1970
The Milwaukee Brewers released Fernando González.
- April 17, 1970
The California Angels purchased Ray Oyler from the Oakland Athletics.
- April 20, 1970
The Atlanta Braves signed Turk Farrell as a free agent.
The Montreal Expos purchased Jim Gosger from the San Francisco Giants.
- April 22, 1970
The Chicago Cubs traded Jim Qualls to the Montreal Expos for Garry Jestadt.
- April 23, 1970
The Chicago Cubs signed Steve Barber as a free agent.
- April 24, 1970
The Los Angeles Dodgers released Al McBean.
The Pittsburgh Pirates signed Al McBean as a free agent.
- April 27, 1970
The Washington Senators released Pedro Ramos.
The California Angels traded Rick Reichardt and Aurelio Rodríguez to the Washington Senators for Ken McMullen.
- April 28, 1970
The Montreal Expos released Ken Johnson.
- April 30, 1970
The Atlanta Braves signed Ron Kline as a free agent.
- May 1, 1970
The Atlanta Braves signed Tom Kelley as a free agent.
- May 4, 1970
The Minnesota Twins traded a player to be named later to the Chicago White Sox for Cotton Nash. The Minnesota Twins sent Jerry Crider (May 4, 1970) to the Chicago White Sox to complete the trade.
- May 5, 1970
The Oakland Athletics released Tony Pierce.
The Montreal Expos traded Carroll Sembera to the St. Louis Cardinals for Bill Dillman. (Date given is approximate. Exact date is uncertain.)
- May 6, 1970
The Atlanta Braves released Turk Farrell.
- May 11, 1970
The Milwaukee Brewers traded Wayne Comer to the Washington Senators for Hank Allen and Ron Theobald.
- May 12, 1970
The Kansas City Royals released Jerry Adair.
The Chicago Cubs traded Boots Day to the Montreal Expos for Jack Hiatt.
- May 13, 1970
The Milwaukee Brewers released Rich Rollins.
The Cleveland Indians signed Rich Rollins as a free agent.
- May 14, 1970
The Atlanta Braves released Jay Ritchie.
- May 15, 1970
The Montreal Expos purchased Rich Nye from the St. Louis Cardinals.
The Montreal Expos traded Gary Waslewski to the New York Yankees for Dave McDonald.
The Oakland Athletics released Juan Pizarro.
The California Angels signed Juan Pizarro as a free agent.
- May 16, 1970
The California Angels purchased Tommie Reynolds from the Oakland Athletics.
The New York Mets traded a player to be named later, Jay Carden (minors), David Colon (minors), Kevin Collins and Steve Renko to the Montreal Expos for Donn Clendenon. The New York Mets sent Terry Dailey (minors) (May 16, 1970) to the Montreal Expos to complete the trade.
- May 18, 1970
The Pittsburgh Pirates released Al McBean.
The Milwaukee Brewers traded John Donaldson to the Oakland Athletics for Roberto Peña.
- May 19, 1970
The St. Louis Cardinals purchased Don Shaw from the Montreal Expos.
The San Francisco Giants traded Frank Linzy to the St. Louis Cardinals for Jerry Johnson.
- May 20, 1970
The Boston Red Sox signed Jay Ritchie as a free agent. (Date given is approximate. Exact date is uncertain.)
- May 22, 1970
The Cleveland Indians traded Russ Nagelson and Billy Rohr to the Detroit Tigers for Fred Lasher.
- May 26, 1970
The Oakland Athletics sent Roberto Rodríguez to the San Diego Padres as part of a conditional deal.
- May 27, 1970
The Cincinnati Reds signed Arturo DeFreites as an amateur free agent.
- May 28, 1970
The Boston Red Sox traded Tommy Matchick to the Kansas City Royals for Mike Fiore.
- May 29, 1970
The Chicago Cubs traded Ted Abernathy to the St. Louis Cardinals for Phil Gagliano.
- June, 1970
Bucky Guth sent from the Atlanta Braves to the Minnesota Twins in an unknown transaction. (Date given is approximate. Exact date is uncertain.)
Ron Tompkins sent from the Atlanta Braves to the Milwaukee Brewers in an unknown transaction. (Date given is approximate. Exact date is uncertain.)
- June 4, 1970
The San Diego Padres drafted Mike Ivie in the 1st round (1st pick) of the 1970 amateur draft.
The San Francisco Giants drafted Dave Kingman in the 1st round (1st pick) of the 1970 amateur draft (June Secondary). Player signed June 27, 1970.
The Cleveland Indians drafted Steve Dunning in the 1st round (2nd pick) of the 1970 amateur draft.
The Montreal Expos drafted Barry Foote in the 1st round (3rd pick) of the 1970 amateur draft. Player signed June 30, 1970.
The New York Mets drafted Brent Strom in the 1st round (3rd pick) of the 1970 amateur draft (June Secondary).
The Milwaukee Brewers drafted Darrell Porter in the 1st round (4th pick) of the 1970 amateur draft.
The Montreal Expos drafted Sam Ewing in the 1st round (5th pick) of the 1970 amateur draft (June Secondary), but was not signed.
The Chicago White Sox drafted Bucky Dent in the 1st round (6th pick) of the 1970 amateur draft (June Secondary).
The Chicago White Sox drafted Lee Richard in the 1st round (6th pick) of the 1970 amateur draft.
The Los Angeles Dodgers drafted Doug Rau in the 1st round (7th pick) of the 1970 amateur draft (June Secondary).
The Houston Astros drafted Randy Scarbery in the 1st round (7th pick) of the 1970 amateur draft, but was not signed.
The Cincinnati Reds drafted Pat Osburn in the 1st round (9th pick) of the 1970 amateur draft (June Secondary).
The California Angels drafted Paul Dade in the 1st round (10th pick) of the 1970 amateur draft.
The Washington Senators drafted Lenny Randle in the 1st round (10th pick) of the 1970 amateur draft (June Secondary).
The New York Yankees drafted Dave Cheadle in the 1st round (12th pick) of the 1970 amateur draft.
The Detroit Tigers drafted Chuck Seelbach in the 1st round (12th pick) of the 1970 amateur draft (June Secondary).
The Boston Red Sox drafted John LaRose in the 1st round (14th pick) of the 1970 amateur draft (June Secondary).
The San Francisco Giants drafted John D'Acquisto in the 1st round (17th pick) of the 1970 amateur draft.
The Chicago Cubs drafted Tom Lundstedt in the 1st round (17th pick) of the 1970 amateur draft (June Secondary). Player signed June 9, 1970.
The Oakland Athletics drafted Dan Ford in the 1st round (18th pick) of the 1970 amateur draft.
The Chicago Cubs drafted Gene Hiser in the 1st round (19th pick) of the 1970 amateur draft.
The Minnesota Twins drafted Bob Gorinski in the 1st round (22nd pick) of the 1970 amateur draft.
The California Angels drafted Dan Briggs in the 2nd round of the 1970 amateur draft.
The Atlanta Braves drafted Adrian Devine in the 2nd round of the 1970 amateur draft.
The Chicago White Sox drafted Terry Forster in the 2nd round of the 1970 amateur draft.
The Montreal Expos drafted Chip Lang in the 2nd round of the 1970 amateur draft.
The San Francisco Giants drafted Butch Metzger in the 2nd round of the 1970 amateur draft.
The San Diego Padres drafted Dan Spillner in the 2nd round of the 1970 amateur draft.
The Minnesota Twins drafted Mark Wiley in the 2nd round of the 1970 amateur draft.
The Washington Senators drafted Mardie Cornejo in the 2nd round of the 1970 amateur draft (June Secondary), but was not signed.
The Cincinnati Reds drafted Jim Norris in the 2nd round of the 1970 amateur draft (June Secondary), but was not signed.
The Milwaukee Brewers drafted Ken Pape in the 2nd round of the 1970 amateur draft, but was not signed.
The San Francisco Giants drafted Pete Varney in the 2nd round of the 1970 amateur draft (June Secondary), but was not signed.
The San Francisco Giants drafted Jim Barr in the 3rd round of the 1970 amateur draft (June Secondary).
The Atlanta Braves drafted Rod Gilbreath in the 3rd round of the 1970 amateur draft.
The Chicago White Sox drafted Jerry Hairston in the 3rd round of the 1970 amateur draft.
The Los Angeles Dodgers drafted Lance Rautzhan in the 3rd round of the 1970 amateur draft.
The Chicago Cubs drafted Rick Reuschel in the 3rd round of the 1970 amateur draft.
The Atlanta Braves drafted Johnny Grubb in the 3rd round of the 1970 amateur draft (June Secondary), but was not signed.
The Cincinnati Reds drafted Duane Kuiper in the 3rd round of the 1970 amateur draft (June Secondary), but was not signed.
The New York Yankees drafted Fred Lynn in the 3rd round of the 1970 amateur draft, but was not signed.
The Houston Astros drafted Greg Gross in the 4th round of the 1970 amateur draft. Player signed June 9, 1970.
The Atlanta Braves drafted Rowland Office in the 4th round of the 1970 amateur draft.
The Kansas City Royals drafted Tom Poquette in the 4th round of the 1970 amateur draft.
The San Diego Padres drafted Steve Simpson in the 4th round of the 1970 amateur draft.
The Cleveland Indians drafted Doug Ault in the 4th round of the 1970 amateur draft (June Secondary), but was not signed.
The Milwaukee Brewers drafted John Tamargo in the 4th round of the 1970 amateur draft (June Secondary), but was not signed.
The California Angels drafted John Balaz in the 5th round of the 1970 amateur draft.
The Montreal Expos drafted Pat Scanlon in the 5th round of the 1970 amateur draft.
The Cleveland Indians drafted Tommy Smith in the 5th round of the 1970 amateur draft.
The St. Louis Cardinals drafted Greg Terlecky in the 5th round of the 1970 amateur draft.
The Washington Senators drafted Rick Waits in the 5th round of the 1970 amateur draft.
The San Francisco Giants drafted Jim Otten in the 5th round of the 1970 amateur draft, but was not signed.
The Cincinnati Reds drafted Tom Carroll in the 6th round of the 1970 amateur draft.
The San Diego Padres drafted Bob Davis in the 6th round of the 1970 amateur draft.
The Philadelphia Phillies drafted Dave Downs in the 6th round of the 1970 amateur draft. Player signed June 12, 1970.
The Chicago White Sox drafted Jim Geddes in the 6th round of the 1970 amateur draft.
The Milwaukee Brewers drafted Bill Travers in the 6th round of the 1970 amateur draft.
The Baltimore Orioles drafted Ron Hodges in the 6th round of the 1970 amateur draft, but was not signed.
The New York Yankees drafted Don DeMola in the 7th round of the 1970 amateur draft.
The St. Louis Cardinals drafted Don Durham in the 7th round of the 1970 amateur draft.
The California Angels drafted Dick Lange in the 7th round of the 1970 amateur draft.
The Cleveland Indians drafted Jim Kremmel in the 7th round of the 1970 amateur draft, but was not signed.
The Philadelphia Phillies drafted Fred Andrews in the 8th round of the 1970 amateur draft. Player signed June 12, 1970.
The California Angels drafted Doug Howard in the 8th round of the 1970 amateur draft.
The Detroit Tigers drafted John Knox in the 8th round of the 1970 amateur draft.
The Cincinnati Reds drafted Will McEnaney in the 8th round of the 1970 amateur draft.
The St. Louis Cardinals drafted Bob Allietta in the 8th round of the 1970 amateur draft, but was not signed.
The Montreal Expos drafted Phil Garner in the 8th round of the 1970 amateur draft, but was not signed.
The Montreal Expos drafted Joe Gilbert in the 9th round of the 1970 amateur draft. Player signed December 18, 1970.
The Chicago White Sox drafted Rich Gossage in the 9th round of the 1970 amateur draft.
The Detroit Tigers drafted Phil Mankowski in the 9th round of the 1970 amateur draft.
The Baltimore Orioles drafted Tim Nordbrook in the 9th round of the 1970 amateur draft.
The Baltimore Orioles drafted Rob Andrews in the 10th round of the 1970 amateur draft.
The Detroit Tigers drafted Fernando Arroyo in the 10th round of the 1970 amateur draft.
The St. Louis Cardinals drafted Marc Hill in the 10th round of the 1970 amateur draft.
The Cleveland Indians drafted Dennis Kinney in the 10th round of the 1970 amateur draft.
The Cincinnati Reds drafted Ray Knight in the 10th round of the 1970 amateur draft.
The Philadelphia Phillies drafted Craig Robinson in the 11th round of the 1970 amateur draft. Player signed June 7, 1970.
The Pittsburgh Pirates drafted John Caneira in the 11th round of the 1970 amateur draft, but was not signed.
The Chicago Cubs drafted Jackson Todd in the 11th round of the 1970 amateur draft, but was not signed.
The Baltimore Orioles drafted Herb Hutson in the 12th round of the 1970 amateur draft.
The Boston Red Sox drafted Tim Blackwell in the 13th round of the 1970 amateur draft.
The San Diego Padres drafted Steve Dillard in the 13th round of the 1970 amateur draft, but was not signed.
The Pittsburgh Pirates drafted Dave Parker in the 14th round of the 1970 amateur draft.
The Montreal Expos drafted Jerry White in the 14th round of the 1970 amateur draft.
The Washington Senators drafted Joe Simpson in the 14th round of the 1970 amateur draft, but was not signed.
The Minnesota Twins drafted Steve Staggs in the 14th round of the 1970 amateur draft, but was not signed.
The California Angels drafted Steve Stroughter in the 15th round of the 1970 amateur draft, but was not signed.
The Houston Astros drafted Joe Wallis in the 15th round of the 1970 amateur draft, but was not signed.
The Los Angeles Dodgers drafted Mike Vail in the 17th round of the 1970 amateur draft, but was not signed.
The San Diego Padres drafted Ralph Garcia in the 18th round of the 1970 amateur draft.
The Montreal Expos drafted Dale Murray in the 18th round of the 1970 amateur draft.
The California Angels drafted Mike Edwards in the 18th round of the 1970 amateur draft, but was not signed.
The Chicago Cubs drafted Jeff Schneider in the 18th round of the 1970 amateur draft, but was not signed.
The Cincinnati Reds drafted Pat Zachry in the 19th round of the 1970 amateur draft. Player signed July 7, 1970.
The Washington Senators drafted Jerry Remy in the 19th round of the 1970 amateur draft, but was not signed.
The New York Mets drafted Bruce Boisclair in the 20th round of the 1970 amateur draft.
The Chicago White Sox drafted Bruce Miller in the 20th round of the 1970 amateur draft.
The Detroit Tigers drafted Fred Holdsworth in the 21st round of the 1970 amateur draft.
The Washington Senators drafted Bruce Sutter in the 21st round of the 1970 amateur draft, but was not signed.
The Philadelphia Phillies drafted Erskine Thomason in the 22nd round of the 1970 amateur draft. Player signed June 10, 1970.
The San Diego Padres drafted Larry Hardy in the 23rd round of the 1970 amateur draft.
The Pittsburgh Pirates drafted Ed Ott in the 23rd round of the 1970 amateur draft.
The California Angels drafted Sid Monge in the 24th round of the 1970 amateur draft. Player signed June 23, 1970.
The San Francisco Giants drafted Doug Capilla in the 25th round of the 1970 amateur draft. Player signed June 18, 1970.
The Cleveland Indians drafted Sam Bowen in the 25th round of the 1970 amateur draft, but was not signed.
The Cleveland Indians drafted Jeff Newman in the 26th round of the 1970 amateur draft.
The San Francisco Giants drafted Warren Brusstar in the 27th round of the 1970 amateur draft, but was not signed.
The Philadelphia Phillies drafted Bob Beall in the 28th round of the 1970 amateur draft.
The St. Louis Cardinals drafted John Denny in the 29th round of the 1970 amateur draft. Player signed June 19, 1970.
The Baltimore Orioles drafted Bob Myrick in the 29th round of the 1970 amateur draft, but was not signed.
The New York Yankees drafted Doc Medich in the 30th round of the 1970 amateur draft.
The California Angels drafted Mike Krukow in the 32nd round of the 1970 amateur draft, but was not signed.
The Los Angeles Dodgers drafted Greg Shanahan in the 33rd round of the 1970 amateur draft.
The Montreal Expos drafted Roy Smalley in the 35th round of the 1970 amateur draft, but was not signed.
The St. Louis Cardinals drafted Bake McBride in the 37th round of the 1970 amateur draft.
The Baltimore Orioles drafted Mike Bacsik in the 55th round of the 1970 amateur draft, but was not signed.
- June 6, 1970
The Philadelphia Phillies signed Doc Edwards as a free agent.
- June 8, 1970
The Boston Red Sox purchased Cal Koonce from the New York Mets.
The St. Louis Cardinals released Bart Zeller.
- June 9, 1970
The Pittsburgh Pirates signed Orlando Peña as a free agent.
The Milwaukee Brewers purchased Bob Burda from the San Francisco Giants.
- June 10, 1970
The Chicago Cubs signed Bill Bonham as an amateur free agent.
- June 11, 1970
The Milwaukee Brewers traded Steve Hovley to the Oakland Athletics for Al Downing and Tito Francona.
- June 13, 1970
The Washington Senators released Bob Humphreys.
The Houston Astros traded Jim Beauchamp and Leon McFadden to the St. Louis Cardinals for George Culver.
The Kansas City Royals traded Fred Rico to the St. Louis Cardinals for Cookie Rojas.
- June 15, 1970
The Milwaukee Brewers signed Bob Humphreys as a free agent.
The St. Louis Cardinals purchased Bobby Etheridge from the San Diego Padres.
The Oakland Athletics purchased Bob Locker from the Milwaukee Brewers.
The San Diego Padres purchased Ron Willis from the St. Louis Cardinals.
The Chicago White Sox traded Buddy Bradford and Tommie Sisk to the Cleveland Indians for Bob Miller and Barry Moore.
The Baltimore Orioles traded Bobby Floyd to the Kansas City Royals for Moe Drabowsky.
The Cincinnati Reds traded Clyde Mashore to the Montreal Expos for Ty Cline.
The Baltimore Orioles traded Dave May to the Milwaukee Brewers for Dick Baney and Buzz Stephen.
The Milwaukee Brewers traded John O'Donoghue to the Montreal Expos for José Herrera.
- June 17, 1970
The Oakland Athletics signed Mike Barlow as an amateur free agent.
- June 22, 1970
The Montreal Expos signed Bombo Rivera as an amateur free agent.
The Oakland Athletics purchased Tommy Davis from the Houston Astros.
The Atlanta Braves released Ron Kline.
The St. Louis Cardinals selected Chuck Hartenstein off waivers from the Pittsburgh Pirates.
- June 23, 1970
The Chicago Cubs purchased Milt Pappas from the Atlanta Braves.
The Houston Astros traded Mike Marshall to the Montreal Expos for Don Bosch.
The Chicago Cubs traded Don Young to the Oakland Athletics for Roberto Rodríguez.
The San Diego Padres returned Roberto Rodríguez to the Oakland Athletics as part of a conditional deal.
- June 26, 1970
The Boston Red Sox purchased John Kennedy from the Milwaukee Brewers.
- June 27, 1970
The Minnesota Twins signed Craig Kusick as an amateur free agent.
- June 29, 1970
The Chicago Cubs signed Al Spangler as a free agent.
The Atlanta Braves purchased Jimmie Hall from the Chicago Cubs.
The Chicago White Sox purchased Lee Stange from the Boston Red Sox.
- June 30, 1970
The Chicago Cubs released Steve Barber.
- July, 1970
The Kansas City Royals purchased Sandy Valdespino from the Milwaukee Brewers.
- July 1, 1970
The Kansas City Royals traded Chris Zachary to the St. Louis Cardinals for Ted Abernathy.
- July 2, 1970
The Kansas City Royals signed Frank White as an amateur free agent.
- July 5, 1970
The Atlanta Braves signed Steve Barber as a free agent.
- July 6, 1970
The Chicago Cubs released Hank Aguirre.
- July 7, 1970
The Detroit Tigers signed Steve Grilli as an amateur free agent.
- July 8, 1970
The Oakland Athletics released Bob Johnson.
- July 9, 1970
The California Angels traded Juan Pizarro to the Chicago Cubs for Archie Reynolds.
- July 12, 1970
The Atlanta Braves purchased Don Cardwell from the New York Mets.
- July 13, 1970
The San Francisco Giants released Jim Davenport.
- July 14, 1970
The St. Louis Cardinals sent Chuck Hartenstein to the Boston Red Sox as part of a conditional deal.
The Pittsburgh Pirates signed Mario Mendoza as an amateur free agent.
The Washington Senators purchased Greg Goossen from the Milwaukee Brewers.
- July 15, 1970
The San Diego Padres purchased Earl Wilson from the Detroit Tigers.
- July 17, 1970
The Kansas City Royals signed Ron Washington as an amateur free agent.
The California Angels purchased John Purdin from the Los Angeles Dodgers.
- July 20, 1970
The New York Yankees traded John Cumberland to the San Francisco Giants for Mike McCormick.
- July 25, 1970
The Pittsburgh Pirates signed Jimmy Sexton as an amateur free agent.
- July 29, 1970
The Chicago Cubs purchased Joe Pepitone from the Houston Astros.
- August, 1970
Ron Piché sent from the New York Yankees to the Montreal Expos in an unknown transaction. (Date given is approximate. Exact date is uncertain.)
- August 1, 1970
The New York Yankees signed Juan Bernhardt as an amateur free agent.
- August 2, 1970
The Detroit Tigers purchased Kevin Collins from the Montreal Expos.
- August 7, 1970
The Milwaukee Brewers purchased Dick Ellsworth from the Cleveland Indians.
- August 11, 1970
The Cleveland Indians released Lou Klimchock.
- August 12, 1970
The Houston Astros released Jim Bouton.
- August 14, 1970
The St. Louis Cardinals purchased Frank Bertaina from the Baltimore Orioles.
The Oakland Athletics purchased Dooley Womack from the Cincinnati Reds.
- August 19, 1970
The Washington Senators released John Roseboro.
- August 21, 1970
The Los Angeles Dodgers signed Jerry Royster as an amateur free agent.
- August 22, 1970
The New York Mets signed Ike Hampton as an amateur free agent.
- August 24, 1970
The Los Angeles Dodgers signed Sergio Ferrer as an amateur free agent.
The Baltimore Orioles signed Larry Harlow as an amateur free agent.
- August 25, 1970
The San Diego Padres purchased Paul Doyle from the California Angels.
The Los Angeles Dodgers released Camilo Pascual.
- August 26, 1970
The Pittsburgh Pirates released Orlando Peña.
- August 31, 1970
The California Angels purchased Tony González from the Atlanta Braves.
The Pittsburgh Pirates traded Denny Riddleberger and cash to the Washington Senators for George Brunet.
- September 1, 1970
The Milwaukee Brewers signed Harvey Kuenn as a free agent.
The Chicago Cubs purchased Bob Miller from the Chicago White Sox.
The San Diego Padres traded Ron Herbel to the New York Mets for a player to be named later. The New York Mets sent Rod Gaspar (October 20, 1970) to the San Diego Padres to complete the trade.
- September 8, 1970
Syracuse (International) purchased Joe Verbanic from the New York Yankees. (Date given is approximate. Exact date is uncertain.)
- September 9, 1970
The Pittsburgh Pirates released Dave Ricketts.
The Chicago Cubs released Al Spangler.
The Chicago White Sox selected Steve Hamilton off waivers from the New York Yankees.
- September 10, 1970
The Milwaukee Brewers traded Bobby Bolin to the Boston Red Sox for a player to be named later. The Boston Red Sox sent Al Yates (October 6, 1970) to the Milwaukee Brewers to complete the trade.
- September 11, 1970
The Chicago White Sox selected Lee Maye off waivers from the Washington Senators.
- September 14, 1970
The Oakland Athletics traded Mudcat Grant to the Pittsburgh Pirates for a player to be named later. The Pittsburgh Pirates sent Ángel Mangual (October 20, 1970) to the Oakland Athletics to complete the trade.
- September 15, 1970
The Milwaukee Brewers purchased Juan Ríos from the Kansas City Royals.
- September 16, 1970
The Chicago Cubs purchased Tommy Davis from the Oakland Athletics.
- September 18, 1970
The New York Mets purchased Dean Chance from the Cleveland Indians.
- September 20, 1970
The Baltimore Orioles released Jimmie Schaffer.
- September 21, 1970
The Chicago Cubs selected Hoyt Wilhelm off waivers from the Atlanta Braves.
- September 22, 1970
The New York Yankees released Bobby Cox.
- September 23, 1970
The Baltimore Orioles traded Mickey McGuire to the Chicago White Sox for Mickey Scott.
- September 25, 1970
The Minnesota Twins signed Bill Campbell as an amateur free agent.
- September 28, 1970
The St. Louis Cardinals selected Fred Norman off waivers from the Los Angeles Dodgers.
- September 30, 1970
The New York Mets signed Nino Espinosa as an amateur free agent.
- October 1, 1970
The Milwaukee Brewers signed Sixto Lezcano as an amateur free agent.
- October 5, 1970
The Los Angeles Dodgers traded Ted Sizemore and Bob Stinson to the St. Louis Cardinals for Dick Allen.
- October 6, 1970
The Milwaukee Brewers released Harvey Kuenn.
The Boston Red Sox traded Bill Landis to the St. Louis Cardinals for Billy McCool. (Date given is approximate. Exact date is uncertain.)
- October 7, 1970
The Philadelphia Phillies released Doc Edwards.
- October 9, 1970
The Detroit Tigers traded Elliott Maddox, Denny McLain, Norm McRae and Don Wert to the Washington Senators for Ed Brinkman, Joe Coleman, Jim Hannan and Aurelio Rodríguez.
The California Angels traded John Purdin to the Chicago White Sox for Fred Rath.
- October 11, 1970
The Boston Red Sox traded Tony Conigliaro, Ray Jarvis and Jerry Moses to the California Angels for Doug Griffin, Jarvis Tatum and Ken Tatum.
- October 12, 1970
The Philadelphia Phillies signed Jesús Hernáiz as a free agent.
The Chicago Cubs traded Roger Metzger to the Houston Astros for Héctor Torres.
- October 13, 1970
The Chicago White Sox traded Gail Hopkins and John Matias to the Kansas City Royals for Pat Kelly and Don O'Riley.
- October 15, 1970
The New York Yankees traded Dave Kent (minors), Gary Washington (minors) and Charlie Sands to the Pittsburgh Pirates for Jerry Branch (minors), Thomas Frondorf (minors) and Ed Pacheco (minors).
- October 16, 1970
The Pittsburgh Pirates sent George Kopacz to the Milwaukee Brewers as part of a conditional deal.
- October 19, 1970
The Oakland Athletics purchased Ramon Webster from the San Diego Padres.
The Kansas City Royals traded Fran Healy to the San Francisco Giants for Bob Garibaldi.
- October 20, 1970
The San Diego Padres sent Sonny Ruberto to the Cincinnati Reds as part of a conditional deal.
The Milwaukee Brewers purchased Larry Bearnarth from the New York Mets.
The Cincinnati Reds purchased Ed Sprague from the Oakland Athletics.
The Milwaukee Brewers released Max Alvis.
The Minnesota Twins traded Bob Wissler (minors) and Herman Hill to the St. Louis Cardinals for Sal Campisi and Jim Kennedy.
The Milwaukee Brewers traded Jessie Huggins (minors), George Lauzerique and Jerry McNertney to the St. Louis Cardinals for Jim Ellis and Carl Taylor.
- October 21, 1970
The Atlanta Braves traded John Burns (minors) to the California Angels for Marty Perez.
The Boston Red Sox traded Dick Schofield to the St. Louis Cardinals for Jim Campbell.
- October 23, 1970
The Detroit Tigers sent Wayne Redmond to the Philadelphia Phillies as part of a conditional deal.
The Washington Senators purchased Richie Scheinblum from the Cleveland Indians.
- October 24, 1970
The Milwaukee Brewers signed Bill Castro as an amateur free agent.
The Milwaukee Brewers signed Sam Mejías as an amateur free agent.
- October 26, 1970
The Pittsburgh Pirates released Joe Gibbon.
- October 27, 1970
The Milwaukee Brewers released Tito Francona.
- October 28, 1970
The Atlanta Braves released Jimmie Hall.
- November 3, 1970
The Philadelphia Phillies traded a player to be named later and Curt Flood to the Washington Senators for Greg Goossen, Gene Martin and Jeff Terpko. The Philadelphia Phillies sent Jeff Terpko (April 10, 1971) to the Washington Senators to complete the trade.
- November 10, 1970
The Milwaukee Brewers released Mike Hershberger.
- November 24, 1970
The Baltimore Orioles signed Gil Flores as an amateur free agent.
- November 30, 1970
The St. Louis Cardinals drafted Cecil Cooper from the Boston Red Sox in the 1970 rule 5 draft.
The Washington Senators drafted Joe Foy from the New York Mets in the 1970 rule 5 draft.
The Detroit Tigers drafted John Gamble from the Los Angeles Dodgers in the 1970 rule 5 draft.
The California Angels drafted Fred Lasher from the Cleveland Indians in the 1970 rule 5 draft.
The San Diego Padres drafted Bill Laxton from the Philadelphia Phillies in the 1970 rule 5 draft.
The California Angels drafted John Stephenson from the San Francisco Giants in the 1970 rule 5 draft.
The Chicago Cubs drafted Ron Tompkins from the Milwaukee Brewers in the 1970 rule 5 draft.
The Minnesota Twins drafted Vic Albury from the San Diego Padres in the 1970 minor league draft.
The Chicago Cubs drafted Frank Coggins from the Cleveland Indians in the 1970 minor league draft.
The New York Mets drafted Bob Rauch from the Los Angeles Dodgers in the 1970 minor league draft.
The Minnesota Twins drafted Jim Strickland from the Los Angeles Dodgers in the 1970 minor league draft.
The Atlanta Braves drafted Freddie Velázquez from the Montreal Expos in the 1970 minor league draft.
The Atlanta Braves traded Hal Breeden to the Chicago Cubs for Hoyt Wilhelm.
The Baltimore Orioles traded Moe Drabowsky to the St. Louis Cardinals for Jerry DaVanon.
The Chicago Cubs traded Pat Jacquez, Dave Lemonds and Roe Skidmore to the Chicago White Sox for Ossie Blanco and José Ortiz.
The California Angels traded Tom Bradley, Tom Egan and Jay Johnstone to the Chicago White Sox for Ken Berry, Syd O'Brien and Billy Wynne.
The Chicago Cubs traded Willie Smith to the Cincinnati Reds for Danny Breeden.
- December 1, 1970
The Houston Astros purchased Jack Hiatt from the Chicago Cubs.
The Boston Red Sox traded Luis Alvarado and Mike Andrews to the Chicago White Sox for Luis Aparicio.
The Atlanta Braves traded Bob Aspromonte to the New York Mets for Ron Herbel.
The Baltimore Orioles traded Fred Beene, Enzo Hernández, Tom Phoebus and Al Severinsen to the San Diego Padres for Pat Dobson and Tom Dukes. Fred Beene returned to original team on May 16, 1971.
- December 2, 1970
The Kansas City Royals traded Ike Brookens to the St. Louis Cardinals for Tom Hilgendorf.
The Kansas City Royals traded Jim Campanis, Jackie Hernández and Bob Johnson to the Pittsburgh Pirates for Bruce Dal Canton, Jerry May and Freddie Patek.
The Atlanta Braves traded Bob Tillman to the Milwaukee Brewers for Paul Click (minors), John Ryan (minors) and Hank Allen.
- December 3, 1970
The Boston Red Sox purchased Don Bryant from the Houston Astros.
The Boston Red Sox traded Carmen Fanzone to the Chicago Cubs for Phil Gagliano.
The Chicago White Sox traded Barry Moore to the New York Yankees for Bill Robinson.
- December 4, 1970
The San Diego Padres traded Steve Huntz to the San Francisco Giants for William Frost (minors) and Don Mason.
- December 5, 1970
The Detroit Tigers purchased Wayne Comer from the Washington Senators.
- December 11, 1970
The Cleveland Indians traded Duke Sims to the Los Angeles Dodgers for Alan Foster and Ray Lamb.
- December 12, 1970
The Chicago White Sox released Lee Stange.
- December 15, 1970
The California Angels traded Greg Garrett to the Cincinnati Reds for Jim Maloney.
- December 16, 1970
The Baltimore Orioles traded Roger Freed to the Philadelphia Phillies for Jim Hutto, Grant Jackson and Sam Parrilla.
- December 22, 1970
The Atlanta Braves released Don Cardwell.
- December 25, 1970
The Boston Red Sox signed Bo Díaz as an amateur free agent.
- December 28, 1970
The Chicago Cubs released Tommy Davis.
- December 30, 1970
The Montreal Expos traded Dave McDonald to the San Francisco Giants for Ron Hunt.
- December 31, 1970
The Chicago White Sox purchased Chuck Hartenstein from the Boston Red Sox.
- Before 1971 Season
The Milwaukee Brewers signed Bart Zeller as a free agent.
The St. Louis Cardinals signed John Andrews as an amateur free agent.
The New York Mets signed Bob Apodaca as an amateur free agent.
The Kansas City Royals signed Tom Brown as an amateur free agent.
The New York Mets signed Mike Bruhert as an amateur free agent.
The Chicago White Sox signed Mike Buskey as an amateur free agent.
The Los Angeles Dodgers signed Henry Cruz as an amateur free agent.
The Los Angeles Dodgers signed Greg Heydeman as an amateur free agent.
The Oakland Athletics signed Leon Hooten as an amateur free agent.
The Houston Astros signed Al Javier as an amateur free agent.
The Boston Red Sox signed Rick Kreuger as an amateur free agent.
The Kansas City Royals signed Gary Lance as an amateur free agent.
The San Francisco Giants signed Luis Quintana as an amateur free agent.
The St. Louis Cardinals signed Ángel Torres as an amateur free agent.
The St. Louis Cardinals signed Steve Waterbury as an amateur free agent.
The Chicago White Sox purchased Cy Acosta from Jalisco (Mexican).
The Montreal Expos released Marv Staehle.
Jim Clark sent from the Oakland Athletics to the Cleveland Indians in an unknown transaction.
Frank Estrada sent from Mexico City Reds (Mexican) to the New York Mets in an unknown transaction.
Jack Lind sent from the Houston Astros to the Cincinnati Reds in an unknown transaction.
Bruce Look sent from the Minnesota Twins to the New York Yankees in an unknown transaction.
- January 7, 1971
The Pittsburgh Pirates signed Fernando González as a free agent.
- January 12, 1971
The Chicago White Sox traded Darrell Brandon to the Philadelphia Phillies for Rick Joseph.
- January 13, 1971
The San Diego Padres released Earl Wilson.
The San Diego Padres drafted Dave Hilton in the 1st round (1st pick) of the 1971 amateur draft (January).
The Oakland Athletics drafted Phil Garner in the 1st round (3rd pick) of the 1971 amateur draft (January Secondary).
The Houston Astros drafted Doug Konieczny in the 1st round (4th pick) of the 1971 amateur draft (January Secondary).
The Kansas City Royals drafted John Wathan in the 1st round (4th pick) of the 1971 amateur draft (January).
The Chicago White Sox drafted Sam Ewing in the 1st round (5th pick) of the 1971 amateur draft (January Secondary).
The Milwaukee Brewers drafted Don Collins in the 1st round (6th pick) of the 1971 amateur draft (January), but was not signed.
The California Angels drafted Bob Allietta in the 1st round (7th pick) of the 1971 amateur draft (January Secondary).
The Washington Senators drafted Jim Kremmel in the 1st round (9th pick) of the 1971 amateur draft (January Secondary).
The Kansas City Royals drafted Ron Hodges in the 1st round (15th pick) of the 1971 amateur draft (January Secondary), but was not signed.
The Atlanta Braves drafted Pete Varney in the 1st round (20th pick) of the 1971 amateur draft (January Secondary), but was not signed.
The Boston Red Sox drafted Jim Otten in the 1st round (21st pick) of the 1971 amateur draft (January Secondary), but was not signed.
The San Diego Padres drafted Johnny Grubb in the 1st round (24th pick) of the 1971 amateur draft (January Secondary).
The Chicago Cubs drafted Steve Stroughter in the 2nd round of the 1971 amateur draft (January Secondary), but was not signed.
The New York Mets drafted Mardie Cornejo in the 3rd round of the 1971 amateur draft (January Secondary), but was not signed.
The Oakland Athletics drafted Steve Staggs in the 3rd round of the 1971 amateur draft (January Secondary), but was not signed.
The Boston Red Sox drafted John Tamargo in the 3rd round of the 1971 amateur draft (January Secondary), but was not signed.
The St. Louis Cardinals drafted Mike Vail in the 4th round of the 1971 amateur draft (January Secondary).
The California Angels drafted Mike Edwards in the 4th round of the 1971 amateur draft (January Secondary), but was not signed.
The Boston Red Sox drafted Eric Rasmussen in the 4th round of the 1971 amateur draft (January), but was not signed.
The Boston Red Sox drafted Roy Smalley in the 4th round of the 1971 amateur draft (January Secondary), but was not signed.
The Cleveland Indians drafted Jim Norris in the 5th round of the 1971 amateur draft (January Secondary).
The Oakland Athletics drafted Rich Dauer in the 5th round of the 1971 amateur draft (January), but was not signed.
The St. Louis Cardinals drafted Mike Potter in the 6th round of the 1971 amateur draft (January Secondary).
The San Francisco Giants drafted Warren Brusstar in the 6th round of the 1971 amateur draft (January Secondary), but was not signed.
The California Angels drafted Jerry Remy in the 8th round of the 1971 amateur draft (January Secondary).
The St. Louis Cardinals drafted Rick Langford in the 11th round of the 1971 amateur draft (January), but was not signed.
- January 18, 1971
The Pittsburgh Pirates signed Tony Armas as an amateur free agent.
- January 25, 1971
The Cincinnati Reds released Ray Washburn.
- January 26, 1971
Tommie Sisk sent from the Cleveland Indians to the Montreal Expos in an unknown transaction.
- January 28, 1971
The New York Mets signed Benny Ayala as an amateur free agent.
The California Angels traded Bill Voss to the Milwaukee Brewers for Gene Brabender.
- January 29, 1971
The Pittsburgh Pirates traded Matty Alou and George Brunet to the St. Louis Cardinals for Nelson Briles and Vic Davalillo.
- February 2, 1971
The Milwaukee Brewers traded Bob Burda to the St. Louis Cardinals for Fred Reahm (minors).
The Kansas City Royals traded Ellie Rodríguez to the Milwaukee Brewers for Carl Taylor.
- February 4, 1971
The Milwaukee Brewers purchased Joe Nossek from the St. Louis Cardinals.
- February 5, 1971
The Cincinnati Reds released Bo Belinsky. (Date given is approximate. Exact date is uncertain.)
- February 9, 1971
The Chicago White Sox traded Gerry Janeski to the Washington Senators for Rick Reichardt.
- February 10, 1971
The Milwaukee Brewers released Bob Tillman.
The Los Angeles Dodgers traded Andy Kosco to the Milwaukee Brewers for Al Downing.
- February 19, 1971
The Boston Red Sox traded Billy McCool to the Kansas City Royals for Hawk Taylor.
- February 27, 1971
The Baltimore Orioles signed Larry McCall as an amateur free agent.
- March 13, 1971
The California Angels purchased Jeff Torborg from the Los Angeles Dodgers.
- March 15, 1971
The New York Mets purchased George Spriggs from the Kansas City Royals.
The California Angels traded Dave Adlesh and Steve Kealey to the Chicago White Sox for Art Kusnyer.
- March 16, 1971
The Baltimore Orioles signed Orlando Peña as a free agent.
- March 19, 1971
Hawaii (PCL) purchased Dave Baldwin from the Milwaukee Brewers.
- March 23, 1971
The Chicago White Sox traded Steve Hamilton to the San Francisco Giants for Steve Huntz.
- March 24, 1971
The Chicago White Sox traded Bobby Knoop to the Kansas City Royals for a player to be named later and cash. The Kansas City Royals sent Luis Alcaraz (March 30, 1971) to the Chicago White Sox to complete the trade.
- March 25, 1971
The Milwaukee Brewers returned George Kopacz to the Pittsburgh Pirates as part of a conditional deal.
The Montreal Expos purchased Dave McDonald from the San Francisco Giants.
The New York Yankees released Mike McCormick.
- March 26, 1971
The Cleveland Indians purchased Fred Stanley from the Milwaukee Brewers.
- March 27, 1971
The Milwaukee Brewers released Bob Humphreys.
The Milwaukee Brewers released Bob Meyer.
The Milwaukee Brewers released Russ Snyder.
- March 29, 1971
The Oakland Athletics signed Tommy Davis as a free agent.
The Detroit Tigers traded a player to be named later and Mike Adams to the Minnesota Twins for Bill Zepp. The Detroit Tigers sent Arthur Clifford (minors) (May 16, 1971) to the Minnesota Twins to complete the trade.
The Chicago White Sox traded Tommy McCraw to the Washington Senators for Ed Stroud.
- March 30, 1971
The Kansas City Royals released Dave Morehead.
The Detroit Tigers traded Jerry Robertson to the New York Mets for Dean Chance and Bill Denehy.
- March 31, 1971
The Chicago White Sox released Don O'Riley.
The Minnesota Twins released Luis Tiant.
The New York Yankees released Pete Ward.
The Montreal Expos traded Don Hahn to the New York Mets for Rich Hacker and Ron Swoboda.
The Boston Red Sox traded Tony Muser and Vicente Romo to the Chicago White Sox for Duane Josephson and Danny Murphy.
The Cincinnati Reds traded Stan Swanson to the Montreal Expos for Jim Qualls.
- April, 1971
The Atlanta Braves released Hank Allen.
- April 1, 1971
The Cincinnati Reds signed Joe Gibbon as a free agent.
The Chicago White Sox signed Mike Hershberger as a free agent.
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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