The Cincinnati Reds purchased Charlie Carr from the Cleveland Naps.
The Washington Senators drafted Larry Schlafly from Portland (PCL) in the 1905 rule 5 draft.
Toledo (American Association) traded Sam Brown to the Boston Beaneaters for Rip Cannell.
The Philadelphia Athletics signed Jack Coombs as an amateur free agent.
The New York Giants signed Matty Fitzgerald as a free agent.
Toledo (American Association) purchased Ed Kinsella from the Pittsburgh Pirates.
The Brooklyn Superbas purchased Mike O'Neill from the St. Louis Cardinals for $5,000.
Rochester (Eastern) purchased Fred Raymer from the Boston Beaneaters.
The St. Louis Browns released Charlie Starr.
The Detroit Tigers traded Frank Kitson to the Washington Senators for Happy Townsend.
The Washington Senators traded Beany Jacobson to the St. Louis Browns for Willie Sudhoff.
The Boston Beaneaters traded Pat Moran to the Chicago Cubs for Jack O'Neill and Big Jeff Pfeffer.
The Chicago Cubs traded Buttons Briggs, Doc Casey, Billy Maloney, Jack McCarthy and $2,000 to the Brooklyn Superbas for Jimmy Sheckard.
The Pittsburgh Pirates traded Dave Brain, Del Howard and Vive Lindaman to the Boston Beaneaters for Vic Willis.
The Washington Senators purchased Lave Cross from the Philadelphia Athletics.
The Cleveland Naps traded Red Donahue to the Detroit Tigers for Happy Townsend.
The St. Louis Cardinals purchased Babe Adams from Parsons (Missouri Valley).
The Philadelphia Athletics signed Eddie Collins as a free agent.
Fred Jacklitsch sent from the New York Highlanders to York (Tri-State) in an unknown transaction.
The Detroit Tigers purchased Davy Jones from Minneapolis (American Association).
The St. Louis Browns purchased Lou Nordyke from Tacoma (PCL).
The Detroit Tigers purchased Boss Schmidt from Minneapolis (American Association).
The Detroit Tigers purchased Ed Siever from Minneapolis (American Association).
The St. Louis Cardinals signed Oscar Stanage as a free agent.
The Cincinnati Reds traded Al Bridwell to the Boston Beaneaters for Jim Delahanty. (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased Hans Lobert from the Chicago Cubs. (Date given is approximate. Exact date is uncertain.)
Toledo (American Association) purchased Boileryard Clarke from the New York Giants.
The Boston Americans released Yip Owens.
San Francisco (PCL) purchased Gabby Street from the Cincinnati Reds.
St Paul (American Association) purchased Joe Sugden from the St. Louis Browns.
The Cleveland Naps loaned Howard Wakefield to the Washington Senators.
Harry Wolverton jumped from the Boston Beaneaters to Williamsport (Tri-State).
Kansas City (American Association) purchased Jimmy Burke from the St. Louis Cardinals.
Wheeling (Central) traded Bull Smith to the Chicago Cubs for Charles Miller (minors) and Louis Schaub (minors).
Lew Richie of Holyoke (Connecticut State) granted free agency.
The New York Giants traded a player to be named later to Louisville (American Association) for Cecil Ferguson. The New York Giants sent Claude Elliott (April, 1906) to Louisville (American Association) to complete the trade. (Date given is approximate. Exact date is uncertain.)
The St. Louis Cardinals purchased Ambrose Puttmann from the New York Highlanders.
The Philadelphia Phillies signed Lew Richie as a free agent. (Date given is approximate. Exact date is uncertain.)
The Boston Beaneaters purchased Roy Witherup from Akron (Ohio-Pennsylvania).
The Boston Beaneaters signed Gene Good as a free agent.
The Boston Beaneaters signed William McCarthy as an amateur free agent.
The Boston Beaneaters released William McCarthy.
The Brooklyn Superbas traded Doc Gessler to the Chicago Cubs for Hub Knolls.
The New York Highlanders traded Dave Fultz to the Philadelphia Athletics for Danny Hoffman.
Louisville (American Association) purchased Babe Adams from the St. Louis Cardinals. (Date given is approximate. Exact date is uncertain.)
Columbus (American Association) purchased Bill Hinchman from the Cincinnati Reds. (Date given is approximate. Exact date is uncertain.)
The Boston Americans released Jesse Burkett.
The Boston Beaneaters traded Chick Fraser to the Cincinnati Reds for a player to be named later. The Cincinnati Reds sent Gus Dorner (May 10, 1906) to the Boston Beaneaters to complete the trade.
The Chicago Cubs selected Jack Harper off waivers from the Cincinnati Reds.
The St. Louis Cardinals traded Oscar Stanage to the Cincinnati Reds for Carl Druhot.
The Cincinnati Reds purchased Jimmy Barrett from the Detroit Tigers.
The Chicago White Sox purchased Ed Hahn from the New York Highlanders.
The Cincinnati Reds released Jimmy Barrett. (Date given is approximate. Exact date is uncertain.)
The Pittsburgh Pirates purchased Ed Phelps from the Cincinnati Reds.
The Washington Senators purchased Dave Altizer from Lancaster (Ohio-Pennsylvania).
The Boston Americans released Norwood Gibson.
New Haven (Connecticut State) purchased Jack Hannifin from the Philadelphia Athletics.
Toledo (American Association) purchased Jimmy Wiggs from the Detroit Tigers.
The Washington Senators released Barney Wolfe.
The Cincinnati Reds traded Orval Overall and $2,000 to the Chicago Cubs for Bob Wicker.
The Pittsburgh Pirates traded Ed Karger to the St. Louis Cardinals for Chappie McFarland.
The Chicago White Sox purchased Patsy Dougherty from the New York Highlanders.
The Boston Americans signed Bill Carrigan as an amateur free agent.
Joe Ward jumped from the Philadelphia Phillies to Altoona (Tri-State).
The Cincinnati Reds purchased Charley Hall from Seattle (PCL). (Date given is approximate. Exact date is uncertain.)
The Chicago White Sox purchased Babe Towne from Des Moines (Western).
The Chicago Cubs traded Fred Beebe, Pete Noonan and cash to the St. Louis Cardinals for Jack Taylor.
Toledo (American Association) traded Frank Jude to the Cincinnati Reds for Charlie Chech and Fred Odwell.
The New York Giants purchased Cy Seymour from the Cincinnati Reds for $12,000.
The St. Louis Cardinals traded Spike Shannon to the New York Giants for Doc Marshall and Sam Mertes.
The Washington Senators loaned Malachi Kittridge to the Cleveland Naps.
The St. Louis Cardinals traded Homer Smoot to the Cincinnati Reds for Shad Barry.
Kansas City (American Association) traded Bill Phyle to the St. Louis Cardinals for Wish Egan and George McBride. (Date given is approximate. Exact date is uncertain.)
The Pittsburgh Pirates purchased Bill Abstein from Shreveport (Southern Association). (Date given is approximate. Exact date is uncertain.)
The Cleveland Naps purchased Heinie Berger from Columbus (American Association). (Date given is approximate. Exact date is uncertain.)
The Cleveland Naps purchased Joe Birmingham from Amsterdam-Gloversville (New York State) for $1,500.
The New York Highlanders purchased Lew Brockett from Buffalo (Eastern). (Date given is approximate. Exact date is uncertain.)
The Cleveland Naps purchased Ben Caffyn from Des Moines (Western). (Date given is approximate. Exact date is uncertain.)
The Boston Americans purchased Chet Chadbourne from Worcester (New England). (Date given is approximate. Exact date is uncertain.)
The St. Louis Browns purchased Dode Criss from Cleburne (Texas). (Date given is approximate. Exact date is uncertain.)
The Detroit Tigers purchased Red Downs from Topeka (Western Association).
The New York Highlanders purchased Slow Joe Doyle from Wheeling (Central). (Date given is approximate. Exact date is uncertain.)
The Chicago Cubs purchased Kid Durbin from Joplin (Western Association).
The Cincinnati Reds purchased Bill Essick from Portland (PCL). (Date given is approximate. Exact date is uncertain.)
The Washington Senators purchased Clyde Goodwin from Milwaukee (American Association). (Date given is approximate. Exact date is uncertain.)
The Washington Senators purchased Oscar Graham from Oakland (PCL). (Date given is approximate. Exact date is uncertain.)
The Philadelphia Phillies purchased Eddie Grant from Jersey City (Eastern). (Date given is approximate. Exact date is uncertain.)
The Pittsburgh Pirates purchased Bill Hallman from Louisville (American Association). (Date given is approximate. Exact date is uncertain.)
The Cleveland Naps purchased Bill Hinchman from Columbus (American Association). (Date given is approximate. Exact date is uncertain.)
The Detroit Tigers purchased Elijah Jones from Springfield (Three-I). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased John Kane from Seattle (PCL). (Date given is approximate. Exact date is uncertain.)
The Boston Americans purchased Rube Kroh from Albany (New York State). (Date given is approximate. Exact date is uncertain.)
The Cleveland Naps purchased Glenn Liebhardt from Memphis (Southern Association). (Date given is approximate. Exact date is uncertain.)
The Boston Americans purchased Harry Lord from Worcester (New England). (Date given is approximate. Exact date is uncertain.)
The Pittsburgh Pirates purchased Lou Manske from Des Moines (Western). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased Del Mason from Baltimore (Eastern).
The Pittsburgh Pirates purchased Bert Maxwell from Montgomery (Southern Association). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased Larry McLean from Portland (PCL). (Date given is approximate. Exact date is uncertain.)
The Philadelphia Phillies purchased George McQuillan from Jersey City (Eastern). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased Cotton Minahan from Toledo (American Association). (Date given is approximate. Exact date is uncertain.)
The Philadelphia Phillies purchased Walter Moser from Lynchburg (Virginia).
The Philadelphia Athletics purchased Simon Nicholls from Memphis (Southern Association).
The Boston Americans purchased Frank Oberlin from Milwaukee (American Association). (Date given is approximate. Exact date is uncertain.)
The Washington Senators purchased Nig Perrine from Kansas City (American Association). (Date given is approximate. Exact date is uncertain.)
The St. Louis Browns purchased Ollie Pickering from Columbus (American Association). (Date given is approximate. Exact date is uncertain.)
The Boston Americans purchased Tex Pruiett from St Paul (American Association).
The Detroit Tigers purchased Jack Rowan from Leavenworth (Western Association). (Date given is approximate. Exact date is uncertain.)
The Boston Americans purchased Denny Sullivan from Minneapolis (American Association).
The Chicago White Sox purchased Mike Welday from Des Moines (Western). (Date given is approximate. Exact date is uncertain.)
The Detroit Tigers purchased Ed Willett from Wichita (Western Association). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased Harry Wolter from Fresno (PCL). (Date given is approximate. Exact date is uncertain.)
The Brooklyn Superbas selected Chappie McFarland off waivers from the Pittsburgh Pirates.
The New York Giants purchased Frank Burke from New Haven (Connecticut State).
The New York Giants purchased Jack Hannifin from New Haven (Connecticut State).
The Washington Senators purchased Jack Warner from the Detroit Tigers.
Malachi Kittridge returned to the Washington Senators by the Cleveland Naps as part of earlier loan.
The Washington Senators released Malachi Kittridge.
The St. Louis Cardinals purchased John Kelly from Baltimore (Eastern).
The Philadelphia Athletics drafted Claude Berry from Cedar Rapids (Three-I) in the 1906 rule 5 draft.
The Pittsburgh Pirates drafted King Brady from Little Rock (Southern Association) in the 1906 rule 5 draft.
The St. Louis Browns drafted Kid Butler from Akron (Ohio-Pennsylvania) in the 1906 rule 5 draft.
The Cincinnati Reds drafted Lefty Davis from Minneapolis (American Association) in the 1906 rule 5 draft.
The St. Louis Browns purchased Jim Delahanty from the Cincinnati Reds.
The St. Louis Cardinals drafted Art Fromme from Springfield (Three-I) in the 1906 rule 5 draft.
The Pittsburgh Pirates drafted Harl Maggert from Sharon (Ohio-Pennsylvania) in the 1906 rule 5 draft.
The St. Louis Browns drafted Bill McGill from Austin (Texas) in the 1906 rule 5 draft.
The Brooklyn Superbas drafted Nap Rucker from Augusta (South Atlantic) in the 1906 rule 5 draft. (Date given is approximate. Exact date is uncertain.)
The St. Louis Browns drafted Jim Stephens from Dallas (Texas) in the 1906 rule 5 draft.
The Chicago Cubs drafted Bill Sweeney from Portland (PCL) in the 1906 rule 5 draft. (Date given is approximate. Exact date is uncertain.)
The Boston Americans drafted Heinie Wagner from Newark (Eastern) in the 1906 rule 5 draft.
The Washington Senators drafted Willy Wilson from Canton (Central) in the 1906 rule 5 draft.
The Detroit Tigers drafted Jimmy Archer from Atlanta (Southern Association) in the 1906 rule 5 draft.
The St. Louis Cardinals drafted Bobby Byrne from Shreveport (Southern Association) in the 1906 rule 5 draft.
The New York Highlanders drafted Roy Castleton from Youngstown (Ohio-Pennsylvania) in the 1906 rule 5 draft. (Date given is approximate. Exact date is uncertain.)
The Detroit Tigers drafted Tex Erwin from Fort Worth (Texas) in the 1906 rule 5 draft.
The Pittsburgh Pirates drafted Patsy Flaherty from Columbus (American Association) in the 1906 rule 5 draft.
The Brooklyn Superbas drafted Weldon Henley from Rochester (Eastern) in the 1906 rule 5 draft.
The Detroit Tigers drafted Hughie Jennings from Baltimore (Eastern) in the 1906 rule 5 draft.
The Detroit Tigers drafted Red Killefer from Kalamazoo (Southern Michigan) in the 1906 rule 5 draft.
The Pittsburgh Pirates drafted Nick Maddox from Cumberland (POM) in the 1906 rule 5 draft.
The Chicago Cubs drafted Newt Randall from Denver (Western) in the 1906 rule 5 draft.
The Boston Americans drafted Al Shaw from Louisville (American Association) in the 1906 rule 5 draft.
The Pittsburgh Pirates drafted Alan Storke from Providence (Eastern) in the 1906 rule 5 draft.
The Cleveland Naps drafted Jake Thielman from Indianapolis (American Association) in the 1906 rule 5 draft.
The Brooklyn Superbas drafted Jesse Whiting from Lawrence (New England) in the 1906 rule 5 draft. (Date given is approximate. Exact date is uncertain.)
Manchester (New England) sent Tommy Madden to the Boston Beaneaters as part of a conditional deal.
The Chicago Cubs traded a player to be named later, Jack Harper and cash to the Cincinnati Reds for a player to be named later. The Chicago Cubs sent Doc Gessler (January 16, 1907) to the Cincinnati Reds to complete the trade. The Cincinnati Reds sent Chick Fraser (January 16, 1907) to the Chicago Cubs to complete the trade.
The New York Giants purchased Tommy Corcoran from the Cincinnati Reds.
The Cincinnati Reds released Joe Kelley.
The Pittsburgh Pirates traded Ginger Beaumont, Patsy Flaherty and Claude Ritchey to the Boston Beaneaters for Ed Abbaticchio.
The Philadelphia Phillies signed Fred Jacklitsch as a free agent.
The Detroit Tigers purchased Claude Rossman from the Cleveland Naps.
The Washington Senators purchased Bob Ganley from the Pittsburgh Pirates.
The St. Louis Browns traded Pete O'Brien to the Cleveland Naps for Fritz Buelow.
The New York Highlanders traded Joe Yeager to the St. Louis Browns for Branch Rickey.