Transactions listed are from November 1 of previous year to April 1 of the following year.
The New York Yankees purchased Pete Schneider from the Cincinnati Reds.
The New York Yankees traded Ray Caldwell, Frank Gilhooley, Slim Love, Roxy Walters and $15,000 to the Boston Red Sox for Dutch Leonard, Duffy Lewis and Ernie Shore.
The New York Yankees signed George Halas as a free agent.
The New York Giants released Jean Dubuc.
The Boston Braves signed Hod Ford as an amateur free agent.
The Pittsburgh Pirates purchased Vic Saier from the Chicago Cubs.
The Washington Senators purchased Sam Agnew from the Boston Red Sox.
The Pittsburgh Pirates purchased Walter Barbare from the Boston Red Sox.
The New York Giants purchased Lee King from the Pittsburgh Pirates.
The Philadelphia Athletics purchased Fred Thomas from the Boston Red Sox.
The Philadelphia Athletics selected Terry Turner off waivers from the Cleveland Indians.
The New York Giants traded Bill Kelly (minors), Waite Hoyt, Jack Ogden, Jose Rodriguez, Joe Wilhoit and cash to Rochester (International) for Earl Smith.
The Boston Red Sox traded Hal Janvrin and cash to the Washington Senators for Eddie Ainsmith and George Dumont.
The Detroit Tigers traded Ossie Vitt to the Boston Red Sox for Eddie Ainsmith, Slim Love and Chick Shorten.
The St. Louis Cardinals traded Doug Baird, Gene Packard and Stuffy Stewart to the Philadelphia Phillies for Dixie Davis, Pickles Dillhoefer and Milt Stock.
The Cincinnati Reds traded Lena Blackburne to the Boston Braves for Wally Rehg.
The Cincinnati Reds traded Tommy Griffith to the Brooklyn Robins for Jake Daubert.
The St. Louis Cardinals selected Burt Shotton off waivers from the Washington Senators.
The Boston Braves purchased Lee King from Springfield (Eastern).
The St. Louis Browns traded Les Nunamaker to the Cleveland Indians for Josh Billings.
The New York Giants traded Walter Holke and Bill Rariden to the Cincinnati Reds for Hal Chase.
The Boston Braves traded Jimmy Smith and cash to the Cincinnati Reds for Walter Holke.
The St. Louis Browns purchased Wally Mayer from the Boston Red Sox for $5,000.
The Philadelphia Athletics traded Larry Gardner, Charlie Jamieson and Elmer Myers to the Cleveland Indians for Braggo Roth.
The Boston Braves purchased Ray Keating from the New York Yankees.
St Paul (American Association) purchased Ed Fitzpatrick from the Boston Braves.
The Cincinnati Reds selected Ray Fisher off waivers from the New York Yankees.
The Cincinnati Reds selected Slim Sallee off waivers from the New York Giants.
The Philadelphia Athletics purchased Snooks Dowd from the Detroit Tigers.
The Brooklyn Robins purchased Ed Konetchy from the Boston Braves.
The Brooklyn Robins purchased Lee Magee from the Cincinnati Reds.
The Boston Braves purchased Walton Cruise from the St. Louis Cardinals.
The New York Giants selected Mike Gonzalez off waivers from the St. Louis Cardinals.
The Philadelphia Athletics purchased Tom Rogers from the St. Louis Browns.
St Paul (American Association) purchased Al Wickland from the Boston Braves. (Date given is approximate. Exact date is uncertain.)
The Boston Braves released Lee King.
The Boston Braves released Hank Schreiber.
The St. Louis Cardinals purchased Doc Lavan from the Washington Senators.
The Detroit Tigers purchased Dutch Leonard from the New York Yankees for $12,000.
The Chicago White Sox purchased Grover Lowdermilk from the St. Louis Browns.
The New York Giants traded Jim Thorpe to the Boston Braves for . The Boston Braves sent Pat Ragan (May 30, 1919) to the New York Giants to complete the trade.
The Boston Red Sox purchased Bill James from the Detroit Tigers.
Toledo (American Association) purchased Joe Kelly from the Boston Braves.
The Philadelphia Phillies traded Joe Oeschger to the New York Giants for Ed Sicking and George Smith.
The Cincinnati Reds purchased Billy Zitzmann from the Pittsburgh Pirates.
The Chicago Cubs traded Pete Kilduff to the Brooklyn Robins for Lee Magee.
The New York Yankees traded players to be named to St Paul (American Association) for Al Wickland.
The Boston Braves selected Tony Boeckel off waivers from the Pittsburgh Pirates.
The Philadelphia Athletics traded Roy Grover to the Washington Senators for Harry Thompson. (Date given is approximate. Exact date is uncertain.)
The Boston Red Sox purchased Bill Lamar from the New York Yankees.
The New York Giants signed Frankie Frisch as a free agent.
The Philadelphia Athletics traded Braggo Roth and Red Shannon to the Boston Red Sox for Jack Barry and Amos Strunk.
The Boston Braves selected Larry Cheney off waivers from the Brooklyn Robins.
The Pittsburgh Pirates selected Fred Nicholson off waivers from the Detroit Tigers.
The Washington Senators signed Tom Zachary as a free agent.
Oakland (PCL) purchased Bill James from the Boston Braves.
The Washington Senators traded Doc Ayers to the Detroit Tigers for Eric Erickson.
Milwaukee (American Association) purchased Jake Northrop from the Boston Braves.
The Philadelphia Phillies purchased Lena Blackburne from the Boston Braves.
The St. Louis Cardinals traded Lee Meadows and Gene Paulette to the Philadelphia Phillies for Doug Baird, Elmer Jacobs and Frank Woodward.
The Philadelphia Phillies purchased Walt Tragesser from the Boston Braves.
The St. Louis Cardinals traded Frank Snyder to the New York Giants for Ferdie Schupp.
The New York Giants traded Dave Robertson to the Chicago Cubs for Phil Douglas.
The Philadelphia Athletics purchased Glenn Myatt from Houston (Texas).
The New York Yankees traded Bob McGraw, Allen Russell and $40,000 to the Boston Red Sox for Carl Mays.
The Philadelphia Phillies selected Larry Cheney off waivers from the Boston Braves.
The Chicago White Sox selected Erskine Mayer off waivers from the Pittsburgh Pirates.
The St. Louis Cardinals purchased Fritz Mollwitz from the Pittsburgh Pirates.
The Chicago White Sox purchased Win Noyes from the Philadelphia Athletics.
The New York Giants traded Red Causey, Johnny Jones, Mickey O'Neil, Joe Oeschger and $55,000 to the Boston Braves for Art Nehf.
The Chicago Cubs traded Les Mann and Charlie Pick to the Boston Braves for Buck Herzog.
The Boston Red Sox released Ray Caldwell.
The Pittsburgh Pirates traded Casey Stengel to the Philadelphia Phillies for Possum Whitted.
The Boston Braves purchased Gene Bailey from Portland (PCL).
The Chicago White Sox selected Bill James off waivers from the Boston Red Sox.
The Cleveland Indians signed Ray Caldwell as a free agent.
The Washington Senators traded Hal Janvrin and cash to Buffalo (International) for Bucky Harris.
The Brooklyn Robins selected Doug Baird off waivers from the St. Louis Cardinals.
The Boston Braves purchased Dizzy Nutter from New Haven (Eastern).
Waite Hoyt sent from New Orleans (Southern Association) to the Boston Red Sox in an unknown transaction.
The Chicago White Sox selected Pat Ragan off waivers from the New York Giants.
The Boston Braves signed Sam White as an amateur free agent. (Date given is approximate. Exact date is uncertain.)
The Philadelphia Phillies purchased Red Ames from the St. Louis Cardinals.
The Boston Braves purchased John Sullivan from New Orleans (Southern Association).
The St. Louis Cardinals purchased Hal Janvrin from Buffalo (International).
The Philadelphia Phillies returned Red Ames to the St. Louis Cardinals following previous purchase.
The Pittsburgh Pirates selected Nig Clarke off waivers from the Philadelphia Phillies.
The Philadelphia Phillies purchased Johnny Enzmann from the Cleveland Indians.
The Detroit Tigers purchased Babe Pinelli from the Chicago White Sox.
The St. Louis Cardinals signed Jim Bottomley as a free agent.
The St. Louis Cardinals purchased Jack Fournier from Los Angeles (PCL).
The St. Louis Cardinals purchased Jesse Haines from Kansas City (American Association) for $10,000.
The Boston Braves purchased Cy Morgan from Portland (New England).
The Boston Red Sox purchased Tim Hendryx from the St. Louis Browns.
The Philadelphia Phillies purchased Dots Miller from the St. Louis Cardinals.
The Chicago Cubs purchased Zeb Terry from the Pittsburgh Pirates.
The New York Yankees purchased Babe Ruth from the Boston Red Sox for $100,000.
The Philadelphia Phillies purchased Mack Wheat from the Brooklyn Robins.
The Washington Senators traded Eddie Foster, Harry Harper and Mike Menosky to the Boston Red Sox for Braggo Roth and Red Shannon.
The New York Giants purchased Fred Lear from the Chicago Cubs.
Los Angeles (PCL) purchased Ray Keating from the Boston Braves.
The Brooklyn Robins purchased Bill Lamar from the Boston Red Sox.
The Boston Braves purchased Frank Miller from the Pittsburgh Pirates.