All Transactions
Transactions listed are from November 1 of previous year to April 1 of the following year.
- November 13, 1956
The Chicago Cubs traded Warren Hacker, Don Hoak and Pete Whisenant to the Cincinnati Redlegs for Ray Jablonski and Elmer Singleton.
- November 19, 1956
The Philadelphia Phillies traded Del Ennis to the St. Louis Cardinals for Bobby Morgan and Rip Repulski.
- December 3, 1956
The Kansas City Athletics drafted Ed Blake from Toronto (International) in the 1956 rule 5 draft.
The Cincinnati Redlegs drafted Jerry Lynch from the Pittsburgh Pirates in the 1956 rule 5 draft.
The St. Louis Cardinals drafted Lloyd Merritt from the New York Yankees in the 1956 rule 5 draft.
The Chicago Cubs drafted Cal Neeman from the New York Yankees in the 1956 rule 5 draft.
The Baltimore Orioles drafted Tom Patton from the St. Louis Cardinals in the 1956 rule 5 draft.
The St. Louis Cardinals drafted Bob Smith from the Boston Red Sox in the 1956 rule 5 draft.
The Boston Red Sox drafted Jack Spring from the Philadelphia Phillies in the 1956 rule 5 draft.
The St. Louis Cardinals drafted Chuck Essegian from Sacramento (PCL) in the 1956 minor league draft.
The Cincinnati Redlegs drafted Marion Fricano from the Chicago White Sox in the 1956 minor league draft.
The New York Giants drafted Bill Froats from the Detroit Tigers in the 1956 minor league draft.
The New York Giants drafted Roger McCardell from the Milwaukee Braves in the 1956 minor league draft.
The Detroit Tigers drafted Eddie Phillips from the St. Louis Cardinals in the 1956 minor league draft.
The Kansas City Athletics drafted Leo Posada from the Milwaukee Braves in the 1956 minor league draft.
The Milwaukee Braves drafted Daryl Robertson from the New York Giants in the 1956 minor league draft.
The Detroit Tigers drafted Bob Thorpe from the Milwaukee Braves in the 1956 minor league draft.
The Baltimore Orioles drafted Charlie White from the Milwaukee Braves in the 1956 minor league draft.
The New York Giants drafted Ed White from the Chicago White Sox in the 1956 minor league draft.
The Cincinnati Redlegs drafted Maury Wills from the Brooklyn Dodgers in the 1956 minor league draft.
- December 4, 1956
Chuck Essegian of the St. Louis Cardinals granted free agency.
- December 5, 1956
The Detroit Tigers traded Wayne Belardi, Ned Garver, Gene Host, Virgil Trucks and $20,000 to the Kansas City Athletics for Jack Crimian, Jim Finigan, Bill Harrington and Eddie Robinson.
- December 6, 1956
The Detroit Tigers purchased Mel Clark from the Washington Nationals. (Date given is approximate. Exact date is uncertain.)
(Date given is approximate. Exact date is uncertain.)
- December 10, 1956
The New York Giants signed Bobby Bolin as an amateur free agent.
- December 11, 1956
The New York Yankees traded Charlie Silvera and cash and another player to be named to the Chicago Cubs for a player to be named later. The Chicago Cubs sent Harry Chiti (December 14, 1956) to the New York Yankees to complete the trade.
The Chicago Cubs traded Jim Davis, Sam Jones, Hobie Landrith and Eddie Miksis to the St. Louis Cardinals for Wally Lammers (minors), Jackie Collum, Ray Katt and Tom Poholsky.
- December 13, 1956
The Brooklyn Dodgers traded Jackie Robinson to the New York Giants for Dick Littlefield and $30,000. Jackie Robinson refused to report to his new team. Trade was voided and players returned on December 13, 1956.
- Before 1957 Season
The Chicago Cubs signed Bobby Adams as a free agent.
The Philadelphia Phillies signed John Kennedy as a free agent.
The Baltimore Orioles signed Fred Whitfield as a free agent.
The New York Giants signed Matty Alou as an amateur free agent.
The New York Yankees signed George Banks as an amateur free agent.
The Baltimore Orioles signed Steve Barber as an amateur free agent.
The Milwaukee Braves signed Howie Bedell as an amateur free agent.
The St. Louis Cardinals signed Bud Bloomfield as an amateur free agent.
The Cleveland Indians signed Walt Bond as an amateur free agent.
The St. Louis Cardinals signed Cal Browning as an amateur free agent.
The Brooklyn Dodgers signed Mike Brumley as an amateur free agent.
The Baltimore Orioles signed Leo Burke as an amateur free agent.
The Brooklyn Dodgers signed Larry Burright as an amateur free agent.
The Pittsburgh Pirates signed Tom Butters as an amateur free agent.
The Brooklyn Dodgers signed Doug Camilli as an amateur free agent.
The Pittsburgh Pirates signed Donn Clendenon as an amateur free agent.
The Cincinnati Redlegs signed Mike Cuellar as an amateur free agent.
The Philadelphia Phillies signed Tony Curry as an amateur free agent.
The St. Louis Cardinals signed Jack Damaska as an amateur free agent.
The Brooklyn Dodgers signed Jim Duckworth as an amateur free agent.
The Baltimore Orioles signed Chuck Estrada as an amateur free agent.
The New York Giants signed Bob Farley as an amateur free agent.
The Pittsburgh Pirates signed Joe Gibbon as an amateur free agent.
The St. Louis Cardinals signed Bob Gibson as an amateur free agent.
The Cincinnati Redlegs signed Tony González as an amateur free agent.
The St. Louis Cardinals signed Julio Gotay as an amateur free agent.
The Detroit Tigers signed Bill Graham as an amateur free agent.
The St. Louis Cardinals signed Jack Hamilton as an amateur free agent.
The Kansas City Athletics signed Jay Hankins as an amateur free agent.
The Cleveland Indians signed Chuck Hiller as an amateur free agent.
The Chicago White Sox signed Joe Hoerner as an amateur free agent.
The Chicago Cubs signed Lou Jackson as an amateur free agent.
The Chicago White Sox signed Stan Johnson as an amateur free agent.
The Kansas City Athletics signed Lou Klimchock as an amateur free agent.
The Boston Red Sox signed Hal Kolstad as an amateur free agent.
The Pittsburgh Pirates signed Dick Lines as an amateur free agent.
The New York Yankees signed Phil Linz as an amateur free agent.
The New York Giants signed Juan Marichal as an amateur free agent.
The Milwaukee Braves signed Hector Martinez as an amateur free agent.
The Detroit Tigers signed Dick McAuliffe as an amateur free agent.
The Cincinnati Redlegs signed Manny Montejo as an amateur free agent.
The Detroit Tigers signed Jackie Moore as an amateur free agent.
The Boston Red Sox signed Merlin Nippert as an amateur free agent.
The Philadelphia Phillies signed Ed Olivares as an amateur free agent.
The New York Giants signed John Orsino as an amateur free agent.
The Pittsburgh Pirates signed Tom Parsons as an amateur free agent.
The Kansas City Athletics signed Dan Pfister as an amateur free agent.
The Pittsburgh Pirates signed Elmo Plaskett as an amateur free agent.
The Chicago Cubs signed Don Prince as an amateur free agent.
The Brooklyn Dodgers signed Ed Rakow as an amateur free agent.
The Milwaukee Braves signed Merritt Ranew as an amateur free agent.
The St. Louis Cardinals signed Gordie Richardson as an amateur free agent.
The St. Louis Cardinals signed Dave Ricketts as an amateur free agent.
The Brooklyn Dodgers signed Charley Smith as an amateur free agent.
The Brooklyn Dodgers signed Dick Smith as an amateur free agent.
The New York Yankees signed Bill Stafford as an amateur free agent.
The Washington Senators signed Lee Stange as an amateur free agent.
The Washington Senators signed Sandy Valdespino as an amateur free agent.
The Brooklyn Dodgers signed Carl Warwick as an amateur free agent.
The Philadelphia Phillies signed Bobby Wine as an amateur free agent.
The Detroit Tigers signed Jake Wood as an amateur free agent.
The Chicago Cubs obtained Bob Alexander from Portland (PCL) as part of a minor league working agreement.
The Cleveland Indians obtained Floyd Robinson from San Diego (PCL) as part of a minor league working agreement.
The Cleveland Indians obtained Bob Usher from San Diego (PCL) as part of a minor league working agreement.
The Washington Senators released Choo-Choo Coleman.
The Cleveland Indians released Don Minnick.
The Cleveland Indians released Dan Osinski.
Vicente Amor sent from the Chicago Cubs to the Cincinnati Redlegs in an unknown transaction.
Marshall Bridges sent from the Milwaukee Braves to Sacramento (PCL) in an unknown transaction.
Leo Cárdenas sent from Tucson (Arizona-Mexico) to the Cincinnati Redlegs in an unknown transaction.
Chuck Coles sent from the Brooklyn Dodgers to Albuquerque (Western) in an unknown transaction.
Hal Jones sent from the Kansas City Athletics to the Cleveland Indians in an unknown transaction.
John Romonosky sent from the St. Louis Cardinals to Syracuse (Eastern) in an unknown transaction.
Moose Stubing sent from the Pittsburgh Pirates to the New York Giants in an unknown transaction.
Jim Umbricht sent from Baton Rouge (Evangeline) to the Milwaukee Braves in an unknown transaction.
The Cleveland Indians returned Ted Beard to Indianapolis (American Association) after expiration of minor league working agreement.
The Kansas City Athletics returned Bob Kuzava to Columbus (International) after expiration of minor league working agreement.
The Brooklyn Dodgers returned Jack Littrell to Portland (PCL) after expiration of minor league working agreement.
The Brooklyn Dodgers returned Ed Mickelson to Portland (PCL) after expiration of minor league working agreement.
The Cleveland Indians returned George Spencer to Indianapolis (American Association) after expiration of minor league working agreement.
The Chicago White Sox obtained Ted Beard from Indianapolis (American Association) as part of a minor league working agreement.
The Pittsburgh Pirates obtained Bob Kuzava from Columbus (International) as part of a minor league working agreement.
The Chicago Cubs obtained Jack Littrell from Portland (PCL) as part of a minor league working agreement.
The Chicago Cubs obtained Ed Mickelson from Portland (PCL) as part of a minor league working agreement.
The Chicago White Sox obtained George Spencer from Indianapolis (American Association) as part of a minor league working agreement.
- January, 1957
The New York Yankees purchased Don Bradey from the Detroit Tigers.
The Boston Red Sox traded Bill Henry to the Chicago Cubs for Frank Kellert and cash.
- January 9, 1957
The Cleveland Indians released Bob Feller.
- January 18, 1957
The Cincinnati Redlegs released Bruce Edwards.
- January 27, 1957
The Pittsburgh Pirates signed Jack Lamabe as a free agent.
The Philadelphia Phillies signed Wayne Graham as an amateur free agent.
- February 6, 1957
The Pittsburgh Pirates signed Buddy Pritchard as an amateur free agent (bonus baby).
- February 8, 1957
The Baltimore Orioles purchased Jim Brideweser from the Detroit Tigers.
- February 12, 1957
The Detroit Tigers traded Chick King and cash to the Milwaukee Braves for Jack Dittmer.
- February 19, 1957
The Kansas City Athletics traded players to be named later, Wayne Belardi, Art Ditmar, Jack McMahan and Bobby Shantz to the New York Yankees for a player to be named later, Rip Coleman, Milt Graff, Billy Hunter, Mickey McDermott, Tom Morgan and Irv Noren. The New York Yankees sent Jack Urban (April 5, 1957) to the Kansas City Athletics to complete the trade. The Kansas City Athletics sent Curt Roberts (April 4, 1957) and Clete Boyer (June 4, 1957) to the New York Yankees to complete the trade.
- February 21, 1957
The New York Giants signed Manny Mota as an amateur free agent.
- February 26, 1957
The New York Giants traded Hoyt Wilhelm to the St. Louis Cardinals for Whitey Lockman.
- March, 1957
The Philadelphia Phillies signed Chuck Essegian as a free agent.
The Baltimore Orioles released Fred Whitfield. (Date given is approximate. Exact date is uncertain.)
- March 14, 1957
The Boston Red Sox traded Eli Grba and Gordie Windhorn to the New York Yankees for Bill Renna.
- March 21, 1957
The St. Louis Cardinals sent Rocky Nelson (March 21, 1957) to Toronto (International) to complete the trade.
- March 27, 1957
The New York Giants released Bill Sarni.
- April 1, 1957
The Kansas City Athletics returned Ben Flowers to the Philadelphia Phillies as part of a conditional deal. (Date given is approximate. Exact date is uncertain.)
Miami (International) purchased Mickey Micelotta from the Philadelphia Phillies.
- April 3, 1957
The Milwaukee Braves traded Jim Pendleton to the Pittsburgh Pirates for Dick Cole.
- April 5, 1957
The Brooklyn Dodgers traded Chico Fernández to the Philadelphia Phillies for a player to be named later, Melvin Geho (minors), Tim Harkness, Ron Negray, Elmer Valo and $75,000. The Philadelphia Phillies sent Ben Flowers (April 8, 1957) to the Brooklyn Dodgers to complete the trade.
- April 10, 1957
The Chicago Cubs released Ted Tappe.
- April 13, 1957
The Boston Red Sox selected Russ Meyer off waivers from the Cincinnati Redlegs.
- April 15, 1957
The Detroit Tigers released Bob Kennedy.
The Chicago White Sox signed Bob Kennedy as a free agent.
- April 16, 1957
The Cleveland Indians released Sam Mele.
The Chicago Cubs traded Ray Jablonski and Ray Katt to the New York Giants for Bob Lennon and Dick Littlefield.
- April 20, 1957
The Chicago Cubs traded Jim King to the St. Louis Cardinals for Bobby Del Greco and Ed Mayer.
- April 21, 1957
The St. Louis Cardinals signed Walker Cooper as a free agent.
- April 24, 1957
Paul Penson retired from the Philadelphia Phillies. (Date given is approximate. Exact date is uncertain.)
- April 28, 1957
Sacramento (Pacific Coast) purchased Jim Greengrass from the Philadelphia Phillies.
- April 29, 1957
The Boston Red Sox traded Milt Bolling, Russ Kemmerer and Faye Throneberry to the Washington Senators for Bob Chakales and Dean Stone.
- April 30, 1957
The Boston Red Sox purchased Karl Olson from the Washington Senators.
The Boston Red Sox traded Karl Olson to the Detroit Tigers for Jack Phillips.
- May 1, 1957
The Chicago Cubs traded Gene Baker and Dee Fondy to the Pittsburgh Pirates for Dale Long and Lee Walls.
- May 6, 1957
The Detroit Tigers traded Roy Hawes to the Milwaukee Braves for Lou Sleater.
- May 8, 1957
The Washington Senators signed Don Minnick as a free agent.
- May 10, 1957
The Philadelphia Phillies traded Glen Gorbous to the St. Louis Cardinals for Chuck Harmon.
- May 13, 1957
The Boston Red Sox purchased Windy McCall from the New York Giants.
The Chicago Cubs purchased Bobby Morgan from the Philadelphia Phillies.
The Boston Red Sox released Russ Meyer.
The Chicago White Sox released Bob Powell.
- May 14, 1957
The Pittsburgh Pirates purchased Bob Smith from the St. Louis Cardinals.
The New York Giants selected Sandy Consuegra off waivers from the Baltimore Orioles.
- May 15, 1957
The Cleveland Indians traded Bob Usher to the Washington Senators for Dick Brodowski and Dick Tettelbach.
- May 17, 1957
The Chicago White Sox released Ellis Kinder.
The Baltimore Orioles released Tom Patton.
The Detroit Tigers released Eddie Robinson.
- May 19, 1957
The Philadelphia Phillies sent Jim Westlake to Sacramento (Pacific Coast) as part of a conditional deal.
- May 20, 1957
The Cleveland Indians signed Eddie Robinson as a free agent.
The Baltimore Orioles purchased Art Houtteman from the Cleveland Indians.
The Washington Senators selected Rocky Bridges off waivers from the Cincinnati Redlegs.
The Brooklyn Dodgers selected Bob Kennedy off waivers from the Chicago White Sox.
- May 23, 1957
The St. Louis Cardinals signed Von McDaniel as an amateur free agent (bonus baby).
The Brooklyn Dodgers traded Don Elston to the Chicago Cubs for Jackie Collum and Vito Valentinetti.
- May 24, 1957
The Brooklyn Dodgers traded Ben Flowers to the New York Yankees for Jim Fridley.
- May 25, 1957
The Philadelphia Phillies purchased Joe Black from the Cincinnati Redlegs.
- May 26, 1957
The Milwaukee Braves signed John DeMerit as an amateur free agent (bonus baby).
The Brooklyn Dodgers purchased Tommy Lasorda from the New York Yankees.
- May 27, 1957
The Boston Red Sox signed Jerry Mallett as an amateur free agent.
- June, 1957
The Boston Red Sox signed Russ Gibson as an amateur free agent.
Jim Snyder sent from the Baltimore Orioles to the Chicago Cubs in an unknown transaction. (Date given is approximate. Exact date is uncertain.)
- June 1, 1957
The Milwaukee Braves signed Hawk Taylor as an amateur free agent (bonus baby).
- June 3, 1957
The Pittsburgh Pirates signed Ken Hamlin as an amateur free agent.
- June 4, 1957
The New York Giants selected Jim Davis off waivers from the St. Louis Cardinals.
- June 6, 1957
The Chicago White Sox purchased Cloyd Boyer from Sacramento (PCL).
- June 8, 1957
The Chicago Cubs selected Chuck Tanner off waivers from the Milwaukee Braves.
- June 12, 1957
The Boston Red Sox signed Bob Heffner as an amateur free agent.
The Washington Senators purchased Art Schult from the Cincinnati Redlegs.
- June 13, 1957
The Baltimore Orioles signed Frank Zupo as an amateur free agent (bonus baby).
The Baltimore Orioles traded Dick Williams to the Cleveland Indians for Jim Busby.
- June 14, 1957
The Chicago White Sox signed Johnny Callison as an amateur free agent.
The Philadelphia Phillies signed Chris Short as an amateur free agent.
The Baltimore Orioles purchased Ken Lehman from the Brooklyn Dodgers for $30,000.
The Baltimore Orioles traded Mike Fornieles to the Boston Red Sox for Billy Goodman.
The Chicago White Sox traded Dave Philley to the Detroit Tigers for Earl Torgeson.
- June 15, 1957
The Detroit Tigers signed Steve Boros as an amateur free agent (bonus baby).
The Brooklyn Dodgers purchased Babe Birrer from the Baltimore Orioles.
The Kansas City Athletics traded Ryne Duren, Jim Pisoni and Harry Simpson to the New York Yankees for Woodie Held, Billy Martin, Bob Martyn and Ralph Terry.
The Milwaukee Braves traded Ray Crone, Danny O'Connell and Bobby Thomson to the New York Giants for Red Schoendienst.
- June 16, 1957
The Chicago White Sox signed Stover McIlwain as an amateur free agent.
- June 17, 1957
The Washington Senators signed Jim Kaat as an amateur free agent.
The Chicago White Sox signed Charlie Lindstrom as an amateur free agent.
The Philadelphia Phillies released Frank Baumholtz.
- June 18, 1957
The Brooklyn Dodgers released Dave Cole. (Date given is approximate. Exact date is uncertain.)
- June 19, 1957
The Philadelphia Phillies signed Ed Keegan as an amateur free agent.
- June 20, 1957
The Chicago Cubs signed Dick Bertell as an amateur free agent.
The St. Louis Cardinals signed Bob Miller as an amateur free agent (bonus baby).
The Philadelphia Phillies purchased Bobby Young from the Cleveland Indians.
- June 24, 1957
The Baltimore Orioles signed Jack Fisher as an amateur free agent.
The Chicago Cubs signed Gordon Massa as an amateur free agent.
- June 25, 1957
The Kansas City Athletics signed Harry Taylor as an amateur free agent.
- June 26, 1957
The Brooklyn Dodgers signed Rod Miller as an amateur free agent.
The Baltimore Orioles signed Milt Pappas as an amateur free agent.
The Philadelphia Phillies selected Warren Hacker off waivers from the Cincinnati Redlegs.
- June 28, 1957
The Baltimore Orioles signed Jerry Walker as an amateur free agent (bonus baby).
- June 29, 1957
The Cleveland Indians released Eddie Robinson.
- July, 1957
The Milwaukee Braves purchased Dave Roberts from the Baltimore Orioles.
- July 1, 1957
The Chicago Cubs signed Jim Woods as an amateur free agent.
- July 2, 1957
The Cincinnati Redlegs signed Claude Osteen as an amateur free agent.
- July 3, 1957
The Philadelphia Phillies signed Mickey Harrington as an amateur free agent.
- July 5, 1957
The Philadelphia Phillies released Joe Black.
- July 6, 1957
The Milwaukee Braves purchased Nippy Jones from Sacramento (PCL).
- July 13, 1957
The Chicago Cubs signed Harvey Branch as an amateur free agent.
- July 14, 1957
The Detroit Tigers traded Bob Thorpe to the St. Louis Cardinals for Herb Moford.
- July 15, 1957
The Kansas City Athletics purchased Al Grunwald from the Pittsburgh Pirates. (Date given is approximate. Exact date is uncertain.)
- July 29, 1957
The Chicago White Sox released Ron Northey.
- July 30, 1957
The Philadelphia Phillies signed Ron Northey as a free agent.
- August 1, 1957
The Detroit Tigers purchased Johnny Groth from the Kansas City Athletics.
The Boston Red Sox purchased Murray Wall from the New York Giants.
- August 5, 1957
The Detroit Tigers signed George Thomas as an amateur free agent (bonus baby).
- August 6, 1957
The Washington Senators signed Joe Black as a free agent.
- August 7, 1957
The Chicago White Sox purchased Jim Hughes from the Chicago Cubs.
- August 12, 1957
The Kansas City Athletics signed Dave Hill as an amateur free agent (bonus baby).
- August 16, 1957
The Detroit Tigers released Steve Gromek.
- August 17, 1957
The Milwaukee Braves signed Bob Hendley as an amateur free agent.
The Cincinnati Redlegs signed Jay Hook as an amateur free agent (bonus baby).
- August 24, 1957
The Cleveland Indians purchased Vito Valentinetti from the Brooklyn Dodgers.
- August 26, 1957
The Baltimore Orioles signed Dizzy Trout as a free agent.
- August 27, 1957
The Kansas City Athletics selected Al Aber off waivers from the Detroit Tigers.
- August 28, 1957
The Chicago Cubs traded Bob Alexander to the Cleveland Indians for a player to be named later. The Cleveland Indians sent Dolan Nichols (September 14, 1957) to the Chicago Cubs to complete the trade. (Date given is approximate. Exact date is uncertain.)
- August 31, 1957
The St. Louis Cardinals selected Irv Noren off waivers from the Kansas City Athletics.
- September, 1957
The Boston Red Sox signed Bill Spanswick as an amateur free agent.
- September 1, 1957
The Baltimore Orioles signed Eddie Robinson as a free agent.
The Philadelphia Phillies signed Andy Seminick as a free agent.
The New York Yankees selected Sal Maglie off waivers from the Brooklyn Dodgers.
- September 2, 1957
The Washington Senators signed Ralph Lumenti as an amateur free agent (bonus baby).
- September 7, 1957
The Cincinnati Redlegs signed Dave Skaugstad as an amateur free agent.
- September 10, 1957
The Baltimore Orioles purchased Bo Belinsky from Pensacola (Alabama-Florida) for $1,000.
The New York Yankees purchased Bobby Del Greco from the Chicago Cubs.
- September 14, 1957
The Detroit Tigers purchased Bill Taylor from the New York Giants.
- September 19, 1957
The St. Louis Cardinals purchased Bob Kuzava from the Pittsburgh Pirates.
The St. Louis Cardinals purchased Morrie Martin from the Baltimore Orioles.
The Baltimore Orioles selected Eddie Miksis off waivers from the St. Louis Cardinals.
- September 21, 1957
The Cleveland Indians selected Hoyt Wilhelm off waivers from the St. Louis Cardinals.
- September 24, 1957
The Kansas City Athletics signed Howie Reed as an amateur free agent.
- October 7, 1957
The Baltimore Orioles released Eddie Robinson.
The Baltimore Orioles released Dizzy Trout.
- October 8, 1957
The Cincinnati Redlegs purchased Steve Bilko from the Chicago Cubs.
- October 10, 1957
The Cincinnati Redlegs purchased Rudy Minarcin from the Boston Red Sox.
- October 15, 1957
The San Francisco Giants purchased Dave Jolly from the Milwaukee Braves.
The Cleveland Indians purchased Bud Podbielan from the Cincinnati Redlegs. (Date given is approximate. Exact date is uncertain.)
The St. Louis Cardinals released Walker Cooper.
The St. Louis Cardinals released Murry Dickson.
The Los Angeles Dodgers released Bob Kennedy.
The Philadelphia Phillies released Ron Northey.
The Detroit Tigers traded Jack Dittmer to the San Francisco Giants for Wayne Terwilliger.
- October 29, 1957
The Philadelphia Phillies signed George Williams as an amateur free agent.
- November 16, 1957
The Chicago Cubs traded Casey Wise to the Milwaukee Braves for Leonard Williams (minors), Ben Johnson, Chick King and cash.
- November 20, 1957
The Detroit Tigers traded a player to be named later, Kent Hadley, Frank House, Duke Maas, Jim Small, John Tsitouris and Bill Tuttle to the Kansas City Athletics for Billy Martin, Mickey McDermott, Tom Morgan, Lou Skizas, Tim Thompson and Gus Zernial. The Detroit Tigers sent Jim McManus (April 3, 1958) to the Kansas City Athletics to complete the trade.
- November 25, 1957
The Washington Senators released Joe Black.
- November 26, 1957
The Chicago Cubs released Charlie Silvera.
- December 2, 1957
The Kansas City Athletics drafted Harry Chiti from the New York Yankees in the 1957 rule 5 draft.
The Boston Red Sox drafted Chuck Churn from the Pittsburgh Pirates in the 1957 rule 5 draft.
The St. Louis Cardinals drafted Tom Flanigan from the Chicago White Sox in the 1957 rule 5 draft.
The Cleveland Indians drafted Gary Geiger from the St. Louis Cardinals in the 1957 rule 5 draft.
The Philadelphia Phillies drafted Johnny Gray from the Cleveland Indians in the 1957 rule 5 draft.
The Baltimore Orioles drafted Bert Hamric from the Los Angeles Dodgers in the 1957 rule 5 draft.
The Washington Senators drafted Bobby Malkmus from the Milwaukee Braves in the 1957 rule 5 draft.
The Chicago Cubs drafted Tony Taylor from the San Francisco Giants in the 1957 rule 5 draft.
The St. Louis Cardinals drafted Ellis Burton from the Pittsburgh Pirates in the 1957 minor league draft.
The Detroit Tigers drafted Hy Cohen from the Chicago Cubs in the 1957 minor league draft.
The Kansas City Athletics drafted Ramón Conde from the San Francisco Giants in the 1957 minor league draft.
The Los Angeles Dodgers drafted Felipe Montemayor from Mexico City Tigers (Mexican) in the 1957 minor league draft.
The Los Angeles Dodgers drafted Tony Roig from the Washington Senators in the 1957 minor league draft.
The Chicago Cubs drafted Marcelino Solis from Saltillo (Central Mexican) in the 1957 minor league draft.
The St. Louis Cardinals drafted Karl Spooner from the Los Angeles Dodgers in the 1957 minor league draft.
The Los Angeles Dodgers drafted Walt Streuli from the Detroit Tigers in the 1957 minor league draft.
The St. Louis Cardinals drafted Lee Tate from the San Francisco Giants in the 1957 minor league draft.
- December 3, 1957
The Baltimore Orioles traded Tito Francona, Billy Goodman and Ray Moore to the Chicago White Sox for Larry Doby, Jack Harshman, Russ Heman and Jim Marshall.
- December 4, 1957
The Chicago White Sox traded Fred Hatfield and Minnie Miñoso to the Cleveland Indians for Al Smith and Early Wynn.
The Cincinnati Redlegs selected Bill Wight off waivers from the Baltimore Orioles.
- December 5, 1957
The Cincinnati Redlegs traded Curt Flood and Joe Taylor to the St. Louis Cardinals for Marty Kutyna, Willard Schmidt and Ted Wieand.
The Chicago Cubs traded Eddie Haas, Don Kaiser and Bob Rush to the Milwaukee Braves for Taylor Phillips and Sammy Taylor.
- December 9, 1957
The New York Yankees released Jerry Coleman.
The Cincinnati Redlegs traded Don Gross to the Pittsburgh Pirates for Bob Purkey.
- December 10, 1957
The Chicago Cubs traded Tom Poholsky to the San Francisco Giants for Freddy Rodríguez.
- December 11, 1957
The Philadelphia Phillies purchased Dave Philley from the Detroit Tigers.
- December 12, 1957
The Detroit Tigers purchased Jim Delsing from the Chicago White Sox.
The Detroit Tigers purchased George Spencer from the Chicago White Sox.
- December 16, 1957
Havana (International) purchased Marv Blaylock from the Philadelphia Phillies.
The Cincinnati Redlegs traded Wally Post to the Philadelphia Phillies for Harvey Haddix.
- December 17, 1957
The Boston Red Sox released Gene Mauch.
- December 18, 1957
The San Francisco Giants released Wes Westrum.
- December 19, 1957
The Philadelphia Phillies released Andy Seminick.
- December 23, 1957
The Cincinnati Redlegs signed Jim O'Toole as an amateur free agent.
- December 28, 1957
The Cincinnati Redlegs traded Ted Kluszewski to the Pittsburgh Pirates for Dee Fondy.
- Before 1958 Season
The St. Louis Cardinals signed Fred Whitfield as a free agent.
The Cleveland Indians signed Max Alvis as an amateur free agent.
The New York Yankees signed Rich Barry as an amateur free agent.
The Kansas City Athletics signed Norm Bass as an amateur free agent.
The St. Louis Cardinals signed Jim Beauchamp as an amateur free agent.
The Pittsburgh Pirates signed Ron Brand as an amateur free agent.
The Cleveland Indians signed Larry Brown as an amateur free agent.
The St. Louis Cardinals signed Bob Burda as an amateur free agent.
The Boston Red Sox signed Galen Cisco as an amateur free agent.
The New York Yankees signed Horace Clarke as an amateur free agent.
The San Francisco Giants signed Charlie Dees as an amateur free agent.
The Cleveland Indians signed Miguel de la Hoz as an amateur free agent.
The Pittsburgh Pirates signed Jim Dickson as an amateur free agent.
The Cleveland Indians signed Doc Edwards as an amateur free agent.
The Detroit Tigers signed Dick Egan as an amateur free agent.
The Pittsburgh Pirates signed Larry Elliot as an amateur free agent.
The Detroit Tigers signed Lorencito Fernández as an amateur free agent.
The San Francisco Giants signed Eddie Fisher as an amateur free agent.
The Detroit Tigers signed Larry Foster as an amateur free agent.
The Detroit Tigers signed Doug Gallagher as an amateur free agent.
The New York Yankees signed Pedro González as an amateur free agent.
The San Francisco Giants signed Tom Haller as an amateur free agent.
The San Francisco Giants signed Ron Herbel as an amateur free agent.
The Milwaukee Braves signed Rick Herrscher as an amateur free agent.
The Chicago White Sox signed Dennis Higgins as an amateur free agent.
The Kansas City Athletics signed Dick Howser as an amateur free agent.
The St. Louis Cardinals signed Dick Hughes as an amateur free agent.
The Detroit Tigers signed Bob Humphreys as an amateur free agent.
The Cincinnati Redlegs signed Ken Hunt as an amateur free agent.
The St. Louis Cardinals signed Charlie James as an amateur free agent.
The Milwaukee Braves signed Mack Jones as an amateur free agent.
The St. Louis Cardinals signed Chris Krug as an amateur free agent.
The Cleveland Indians signed Jack Kubiszyn as an amateur free agent.
The Cleveland Indians signed Jim Lawrence as an amateur free agent.
The Baltimore Orioles signed Jim Lehew as an amateur free agent.
The San Francisco Giants signed Dick LeMay as an amateur free agent.
The New York Yankees signed Don Lock as an amateur free agent.
The Cleveland Indians signed Ramón López as an amateur free agent.
The Pittsburgh Pirates signed Al McBean as an amateur free agent.
The Pittsburgh Pirates signed Orlando McFarlane as an amateur free agent.
The Chicago White Sox signed Jerry McNertney as an amateur free agent.
The New York Yankees signed Pete Mikkelsen as an amateur free agent.
The Cincinnati Redlegs signed Bob Moorhead as an amateur free agent.
The Boston Red Sox signed Al Moran as an amateur free agent.
The Baltimore Orioles signed Buster Narum as an amateur free agent.
The Detroit Tigers signed Ron Nischwitz as an amateur free agent.
The Baltimore Orioles signed John Papa as an amateur free agent.
The New York Yankees signed Joe Pepitone as an amateur free agent.
The Pittsburgh Pirates signed John Pregenzer as an amateur free agent.
The Los Angeles Dodgers signed Pete Richert as an amateur free agent.
The Los Angeles Dodgers signed Earl Robinson as an amateur free agent.
The Pittsburgh Pirates signed Vic Roznovsky as an amateur free agent.
The Cincinnati Redlegs signed Chico Ruiz as an amateur free agent.
The St. Louis Cardinals signed Ray Sadecki as an amateur free agent.
The St. Louis Cardinals signed Bob Sadowski as an amateur free agent.
The Milwaukee Braves signed Amado Samuel as an amateur free agent.
The Boston Red Sox signed Don Schwall as an amateur free agent.
The Washington Senators signed Johnnie Seale as an amateur free agent.
The Cincinnati Redlegs signed Diego Seguí as an amateur free agent.
The St. Louis Cardinals signed Mike Shannon as an amateur free agent.
The Cleveland Indians signed Sonny Siebert as an amateur free agent.
The San Francisco Giants signed José Tartabull as an amateur free agent.
The New York Yankees signed Tom Tresh as an amateur free agent.
The Pittsburgh Pirates signed Bob Veale as an amateur free agent.
The San Francisco Giants signed Freddie Velázquez as an amateur free agent.
The Washington Senators signed Zoilo Versalles as an amateur free agent.
The San Francisco Giants signed José Vidal as an amateur free agent.
The Baltimore Orioles signed Pete Ward as an amateur free agent.
The Chicago Cubs signed Jack Warner as an amateur free agent.
The Cleveland Indians signed Jim Weaver as an amateur free agent.
The Detroit Tigers signed Don Wert as an amateur free agent.
The New York Yankees signed Dooley Womack as an amateur free agent.
The Boston Red Sox signed Tom Borland as a free agent.
The Detroit Tigers signed George Smith as a free agent.
The Milwaukee Braves obtained Cecil Butler from Atlanta (Southern Association) as part of a minor league working agreement.
The Cincinnati Redlegs obtained Chuck Coles from Albuquerque (Western) as part of a minor league working agreement.
The Milwaukee Braves released Chet Nichols.
Manny Jiménez sent from Ciudad Juarez (Mexican) to the Milwaukee Braves in an unknown transaction.
Hector Martinez sent from the Milwaukee Braves to the Cleveland Indians in an unknown transaction.
Ed Olivares sent from the Philadelphia Phillies to the St. Louis Cardinals in an unknown transaction.
Marshall Renfroe sent from the New York Yankees to the San Francisco Giants in an unknown transaction.
John Romonosky sent from Syracuse (Eastern) to the Washington Senators in an unknown transaction.
Jim Snyder sent from the Chicago Cubs to the Philadelphia Phillies in an unknown transaction.
Moe Thacker sent from the New York Yankees to the Chicago Cubs in an unknown transaction.
Maury Wills sent from the Cincinnati Redlegs to the Los Angeles Dodgers in an unknown transaction.
The Cincinnati Redlegs released Minnie Mendoza.
The Washington Senators signed Minnie Mendoza as a free agent.
- January 8, 1958
The Chicago Cubs signed Ted Tappe as a free agent.
- January 18, 1958
The Boston Red Sox signed Bob Tillman as an amateur free agent.
- January 23, 1958
The Boston Red Sox traded Albie Pearson and Norm Zauchin to the Washington Senators for Pete Runnels.
- January 26, 1958
The Baltimore Orioles signed Dave Nicholson as an amateur free agent.
- January 28, 1958
The Kansas City Athletics signed Murry Dickson as a free agent.
The Philadelphia Phillies signed Jacke Davis as an amateur free agent.
The Detroit Tigers traded Jim Finigan and $25,000 to the San Francisco Giants for Gail Harris and Ozzie Virgil.
- January 29, 1958
The Boston Red Sox purchased Art Schult from the Washington Senators.
The Cleveland Indians selected Mickey Vernon off waivers from the Boston Red Sox.
- February 18, 1958
The Cleveland Indians traded Hank Aguirre and Jim Hegan to the Detroit Tigers for Jay Porter and Hal Woodeshick.
- February 25, 1958
The Los Angeles Dodgers purchased Solly Drake from the Chicago Cubs. (Date given is approximate. Exact date is uncertain.)
The Cleveland Indians traded Pete Mesa (minors) to the Washington Senators for Milt Bolling.
- March 5, 1958
The Los Angeles Dodgers signed Frank Howard as an amateur free agent.
- March 18, 1958
Spokane (Pacific Coast) purchased Glen Gorbous from the St. Louis Cardinals.
- March 20, 1958
The Philadelphia Phillies purchased Joe Collins from the New York Yankees.
- March 21, 1958
The Chicago White Sox purchased Don Mueller from the San Francisco Giants.
- March 24, 1958
The Baltimore Orioles purchased Foster Castleman from the San Francisco Giants for $30,000.
- March 26, 1958
The San Francisco Giants returned Dave Jolly to the Milwaukee Braves following previous purchase.
The Cleveland Indians selected Chuck Churn off waivers from the Boston Red Sox.
- March 27, 1958
The Cleveland Indians traded Milt Bolling and Vito Valentinetti to the Detroit Tigers for Pete Wojey and $20,000.
- March 30, 1958
The Milwaukee Braves purchased Dick Littlefield from the Chicago Cubs.
- April 1, 1958
The Baltimore Orioles traded Larry Doby and Don Ferrarese to the Cleveland Indians for Bud Daley, Dick Williams and Gene Woodling.
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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