The Cleveland Naps traded Wilbur Good to the Philadelphia Athletics for Simon Nicholls. (Date given is approximate. Exact date is uncertain.)
The Washington Senators purchased Kid Elberfeld from the New York Highlanders for $5,000.
The Pittsburgh Pirates purchased John Flynn from St Paul (American Association) for $4,000.
The St. Louis Browns traded Lou Criger to the New York Highlanders for Ray Demmitt and Joe Lake.
Rochester (International) purchased Andy O'Connor from the New York Highlanders.
Montreal (International) purchased Pete Wilson from the New York Highlanders.
Rochester (Eastern) purchased Walter Blair from the New York Highlanders for $1,500. (Date given is approximate. Exact date is uncertain.)
The New York Highlanders purchased Ray Fisher from Hartford (Connecticut State).
The New York Highlanders purchased Eddie Foster from the Detroit Tigers.
The Cleveland Naps signed Roger Peckinpaugh as an amateur free agent. (Date given is approximate. Exact date is uncertain.)
The St. Louis Browns selected Bill Abstein off waivers from the Pittsburgh Pirates.
The Boston Doves released Roy Thomas.
The New York Highlanders selected Harry Wolter off waivers from the Boston Red Sox for $1,500.
The Philadelphia Phillies traded Frank Corridon and Harry Coveleski to the Cincinnati Reds for Ad Brennan and Bob Ewing.
The Chicago Cubs traded Fred Liese and cash to the Boston Doves for Ginger Beaumont.
The St. Louis Cardinals traded Fred Beebe and Alan Storke to the Cincinnati Reds for Frank Corridon, Miller Huggins and Rebel Oakes.
The St. Louis Cardinals purchased Vic Willis from the Pittsburgh Pirates.
The Chicago White Sox traded players to be named later to Providence (Eastern) for Lena Blackburne. The Chicago White Sox sent $6,500 (August 18, 1909), Mike Welday (August 18, 1909) and John Atz (February 18, 1910) to Providence (Eastern) to complete the trade.
The New York Highlanders released Willie Keeler.
The Boston Doves purchased Doc Martel from Scranton (New York State).
Baltimore (Eastern) purchased Wilbur Good from the Philadelphia Athletics.
The New York Giants traded Bill Collins and Buck Herzog to the Boston Doves for Beals Becker.
Chattanooga (Southern Association) purchased Forrest More from the Boston Doves.
The Brooklyn Superbas traded Harry McIntire to the Chicago Cubs for Bill Davidson, Happy Smith and Tony Smith.
Providence (Eastern) purchased Elmer Steele from the Boston Red Sox.
St Paul (American Association) purchased Fred Liese from the Boston Doves.
The Pittsburgh Pirates traded Sam Frock and Bud Sharpe to the Boston Doves for Kirby White.
The St. Louis Browns purchased Pat Newnam from Houston (Texas).
The New York Giants signed Willie Keeler as a free agent.
The St. Louis Cardinals purchased Elmer Zacher from the New York Giants.
The Boston Doves selected Jiggs Parson off waivers from the New York Giants.
The Boston Red Sox purchased Clyde Engle from the New York Highlanders.
The Philadelphia Phillies purchased Pat Moran from the Chicago Cubs.
The Chicago Cubs traded Doc Miller to the Boston Doves for Lew Richie.
Kansas City (American Association) purchased Herbie Moran from the Boston Doves.
The Chicago White Sox purchased Charlie French from the Boston Red Sox.
The Boston Red Sox purchased Red Kleinow from the New York Highlanders.
The Philadelphia Phillies purchased Eddie Stack from the Chicago Cubs.
The Cleveland Naps purchased Harry Niles from the Boston Red Sox.
The Cincinnati Reds purchased Slow Joe Doyle from the New York Highlanders for $2,000.
The Brooklyn Superbas traded Frank Schneiberg and $3,000 to Des Moines (Western) for Jack Dalton.
The Philadelphia Phillies signed Roy Thomas as a free agent.
The Cincinnati Reds selected Tommy McMillan off waivers from the Brooklyn Superbas.
The Cincinnati Reds purchased Bill Burns from the Chicago White Sox for $4,000.
The Philadelphia Athletics purchased Pat Donahue from the Boston Red Sox.
The Cincinnati Reds traded Jim Doyle and Rabbit Robinson to Louisville (American Association) for Sam Woodruff.
The Chicago White Sox purchased George Browne from the Washington Senators.
The St. Louis Browns selected Bob Spade off waivers from the Cincinnati Reds.
The Cincinnati Reds purchased Rube Benton from Macon (South Atlantic). (Date given is approximate. Exact date is uncertain.)
The Boston Doves signed Ralph Good as an amateur free agent.
The Washington Senators purchased Heinie Beckendorf from the Detroit Tigers.
The Chicago White Sox purchased Red Bowser from Flint (Southern Michigan).
The Boston Doves purchased Ed Abbaticchio from the Pittsburgh Pirates.
The Washington Senators signed John Henry as an amateur free agent.
The Washington Senators released Bill Forman.
Jersey City (Eastern) purchased John Frill from the New York Highlanders.
The Washington Senators released Jack Hardy.
The St. Louis Browns purchased Ray Boyd from Ottumwa (Central Association).
The Philadelphia Athletics purchased Lefty Russell from Baltimore (Eastern) for $12,000.
The Chicago Cubs purchased Vic Saier from Lansing (Southern Michigan) for $1,500.
The Boston Doves selected Art Kruger off waivers from the Cleveland Naps.
The Boston Doves purchased Lefty Tyler from Lowell (New England).
The New York Giants purchased Hank Gowdy from Dallas (Texas).
The Boston Red Sox purchased Walter Moser from Oakland (PCL).
The Philadelphia Athletics traded a player to be named later and Morrie Rath to the Cleveland Naps for Bris Lord. The Philadelphia Athletics sent Shoeless Joe Jackson (July 30, 1910) to the Cleveland Naps to complete the trade.
Indianapolis (American Association) purchased Skip Dowd from the Pittsburgh Pirates.
Kansas City (American Association) purchased Bill Powell from the Pittsburgh Pirates.
The Philadelphia Phillies traded Bill Foxen to the Chicago Cubs for Fred Luderus.
The New York Highlanders purchased Harry Ables from San Antonio (Texas) for $1,000. (Date given is approximate. Exact date is uncertain.)
The New York Highlanders purchased Bill Bailey from Lancaster (Tri-State) for $800. (Date given is approximate. Exact date is uncertain.)
The New York Highlanders purchased Walter Blair from Rochester (Eastern) for $7,000. (Date given is approximate. Exact date is uncertain.)
The New York Highlanders purchased Ray Caldwell from McKeesport (Ohio-Pennsylvania) for $2,000. (Date given is approximate. Exact date is uncertain.)
The Philadelphia Phillies purchased George Chalmers from Scranton (New York State) for $3,000.
The Washington Senators purchased Tom Hughes from Minneapolis (American Association).
The Boston Doves returned Art Kruger to the Cleveland Naps following previous waiver selection.
The New York Giants purchased Jeff Tesreau from Shreveport (Texas).
The Chicago Cubs purchased Fred Toney from Winchester (Blue Grass) for $1,000.
The St. Louis Cardinals purchased Ivey Wingo from Greenville (Carolina Association). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased Mickey Corcoran from Buffalo (Eastern).
The Boston Doves signed Jim Riley as an amateur free agent.
Toronto (Eastern) purchased Ed Killian from the Detroit Tigers.
The Cleveland Naps purchased Dave Callahan from Eau Claire (Minnesota-Wisconsin).
The New York Highlanders purchased Johnny Priest from Danville (Virginia) for $850.
The Boston Doves purchased Bill McTigue from New Bedford (New England).
The St. Louis Cardinals purchased Ody Abbott from Newcastle (Ohio-Pennsylvania).
The St. Louis Browns purchased Joe Crisp from Newark (Eastern).
The Boston Doves purchased Rube Sellers from McKeesport (Ohio-Pennsylvania).
The Chicago White Sox traded Billy Purtell and Frank Smith to the Boston Red Sox for Harry Lord and Amby McConnell.
The St. Louis Browns purchased Fred Link from the Cleveland Naps.
The Pittsburgh Pirates purchased Max Carey from South Bend (Central).
The New York Highlanders purchased Gene Elliott from McKeesport (Ohio-Pennsylvania) for $2,000.
The Pittsburgh Pirates purchased Jack Ferry from Jersey City (Eastern).
The Chicago Cubs purchased Jim Doyle from Louisville (American Association).
Kansas City (American Association) traded Newt Hunter to the Pittsburgh Pirates for players to be named later. The Pittsburgh Pirates sent Tom Raftery (September 16, 1910), E.E. Gardner (minors) (September 16, 1910) and Harry Selbert (minors) (September 16, 1910) to Kansas City (American Association) to complete the trade.
Baltimore (Eastern) purchased Cy Seymour from the New York Giants.
Louisville (American Association) purchased Rube Kroh from the Chicago Cubs.
Alex Malloy sent from Houston (Texas) to the St. Louis Browns in an unknown transaction. (Date given is approximate. Exact date is uncertain.)
The Brooklyn Superbas drafted Raleigh Aitchison from Wichita (Western) in the 1910 rule 5 draft.
The Philadelphia Phillies drafted Pete Alexander from Syracuse (New York State) in the 1910 rule 5 draft.
The Cincinnati Reds drafted Dave Altizer from Minneapolis (American Association) in the 1910 rule 5 draft.
The Boston Red Sox drafted Hugh Bedient from Fall River (New England) in the 1910 rule 5 draft.
The Chicago White Sox drafted Ping Bodie from San Francisco (PCL) in the 1910 rule 5 draft.
The Brooklyn Superbas drafted Sandy Burk from Fort Worth (Texas) in the 1910 rule 5 draft.
The Chicago White Sox drafted Felix Chouinard from Green Bay (Wisconsin State) in the 1910 rule 5 draft.
The Boston Doves drafted Josh Clarke from St Paul (American Association) in the 1910 rule 5 draft.
The Philadelphia Athletics drafted Allan Collamore from Worcester (New England) in the 1910 rule 5 draft.
The Brooklyn Superbas drafted Bob Coulson from Altoona (Tri-State) in the 1910 rule 5 draft.
The Boston Doves drafted Rowdy Elliott from Birmingham (Southern Association) in the 1910 rule 5 draft.
The St. Louis Browns drafted Lefty George from Indianapolis (American Association) in the 1910 rule 5 draft.
The Philadelphia Phillies drafted Charlie Girard from York (Tri-State) in the 1910 rule 5 draft.
The Boston Doves drafted Wilbur Good from Baltimore (Eastern) in the 1910 rule 5 draft.
The Chicago Cubs drafted Hank Griffin from Atlanta (Southern Association) in the 1910 rule 5 draft.
The St. Louis Browns drafted Ed Hallinan from Los Angeles (PCL) in the 1910 rule 5 draft.
The New York Giants drafted Grover Hartley from Toledo (American Association) in the 1910 rule 5 draft.
The Chicago Cubs drafted Bill James from Jackson (Southern Michigan) in the 1910 rule 5 draft.
The Chicago Cubs drafted Al Kaiser from Paris (Blue Grass) in the 1910 rule 5 draft.
The New York Highlanders drafted Benny Kauff from Parkersburg (Virginia Valley) in the 1910 rule 5 draft.
The Boston Red Sox drafted Jack Killilay from Spokane (Northwestern) in the 1910 rule 5 draft.
The Brooklyn Superbas drafted Sheldon Lejeune from Evansville (Central) in the 1910 rule 5 draft.
The Philadelphia Phillies drafted Hughie Miller from Keokuk (Central Association) in the 1910 rule 5 draft.
The St. Louis Browns drafted Hap Myers from Louisville (American Association) in the 1910 rule 5 draft.
The Philadelphia Athletics drafted Steve O'Neill from Elmira (New York State) in the 1910 rule 5 draft.
The St. Louis Browns drafted Jeff Pfeffer from Fort Wayne (Central) in the 1910 rule 5 draft.
The Boston Red Sox drafted Joe Riggert from Omaha (Western) in the 1910 rule 5 draft.
The New York Giants drafted Dick Rudolph from Toronto (Eastern) in the 1910 rule 5 draft.
The Cincinnati Reds drafted Barney Schreiber from Denver (Western) in the 1910 rule 5 draft.
The Detroit Tigers drafted Dave Skeels from Regina (Western Canada) in the 1910 rule 5 draft.
The Pittsburgh Pirates drafted Sherry Smith from Jacksonville (South Atlantic) in the 1910 rule 5 draft.
The Cleveland Naps drafted Syd Smith from Anderson (Carolina Association) in the 1910 rule 5 draft.
The Boston Doves drafted Harry Spratt from Roanoke (Virginia) in the 1910 rule 5 draft.
The Boston Red Sox drafted Pinch Thomas from Sacramento (PCL) in the 1910 rule 5 draft.
The Chicago White Sox drafted Buck Weaver from York (Tri-State) in the 1910 rule 5 draft.
The Chicago Cubs drafted Orlie Weaver from Jacksonville (South Atlantic) in the 1910 rule 5 draft.
The Brooklyn Superbas drafted Eddie Zimmerman from Newark (International) in the 1910 rule 5 draft.
The Pittsburgh Pirates purchased Elmer Steele from Providence (Eastern). (Date given is approximate. Exact date is uncertain.)
The Boston Doves released Ed Abbaticchio.
Rochester (Eastern) purchased George Crable from the Brooklyn Superbas. (Date given is approximate. Exact date is uncertain.)
Baltimore (Eastern) purchased Walt Dickson from the New York Giants. (Date given is approximate. Exact date is uncertain.)
Rochester (Eastern) purchased Fred Miller from the Brooklyn Superbas. (Date given is approximate. Exact date is uncertain.)
Montreal (Eastern) purchased Ward Miller from the Cincinnati Reds. (Date given is approximate. Exact date is uncertain.)
Rochester (Eastern) purchased Kaiser Wilhelm from the Brooklyn Superbas. (Date given is approximate. Exact date is uncertain.)
The Brooklyn Superbas selected Harry Smith off waivers from the Boston Doves.
Kansas City (American Association) purchased Nick Maddox from the Pittsburgh Pirates.
The Philadelphia Phillies traded Johnny Bates, Eddie Grant, George McQuillan and Lew Moren to the Cincinnati Reds for Fred Beebe, Hans Lobert, Dode Paskert and Jack Rowan.
Indianapolis (American Association) purchased Gus Getz from the Boston Doves.
The St. Louis Browns traded Art Griggs to the Cleveland Naps for Nig Clarke.
The Boston Doves signed Fred Tenney as a free agent.
Chattanooga (Southern Association) purchased Harry Coveleski from the Cincinnati Reds.
Montreal (Eastern) purchased Chick Gandil from the Chicago White Sox.
The New York Giants purchased Heinie Groh from Oshkosh (Wisconsin State).
Bill James sent from the Chicago Cubs to the Cleveland Naps in an unknown transaction.
The Boston Rustlers traded George Walsh (minors) and $800 to Fall River (New England) for Art Butler.
The Boston Rustlers signed Patsy Flaherty as a free agent.
The Chicago White Sox purchased Matty McIntyre from the Detroit Tigers.
The Cincinnati Reds purchased Fred Beck from the Boston Rustlers.
Buffalo (Eastern) purchased Bud Sharpe from the Boston Rustlers.
The St. Louis Browns traded Roy Hartzell and cash to the New York Highlanders for Jimmy Austin and Frank LaPorte.
The Chicago Cubs traded Scotty Ingerton and Big Jeff Pfeffer to the Boston Rustlers for Dave Shean.
The Boston Rustlers signed Herman Young as an amateur free agent.
The Brooklyn Dodgers purchased Hub Northen from the Cincinnati Reds.