Transactions listed are from November 1 of previous year to April 1 of the following year.
The Pittsburgh Pirates traded Jack Chesbro, Paddy Fox, Art Madison, John O'Brien and $25,000 to the Louisville Colonels for Fred Clarke, Bert Cunningham, Mike Kelley, Tacks Latimer, Tommy Leach, Tom Messitt, Deacon Phillippe, Claude Ritchey, Rube Waddell, Jack Wadsworth, Honus Wagner and Chief Zimmer.
The Chicago Orphans purchased Jack McCarthy from the Pittsburgh Pirates for $2,000.
The Chicago Orphans purchased Billy Clingman from the Louisville Colonels.
The Chicago Orphans drafted Zaza Harvey from Sacramento (California) in the 1900 rule 5 draft.
The Philadelphia Phillies purchased Fred Jacklitsch from Montreal (Eastern).
Jimmy Sheckard assigned the Baltimore Orioles to the Brooklyn Superbas.
The St. Louis Cardinals purchased Patsy Donovan from the Pittsburgh Pirates for $1,000.
The Brooklyn Superbas purchased Farmer Steelman from the Louisville Colonels.
The New York Giants purchased Win Mercer from the Washington Senators.
The Cincinnati Reds returned Kid Elberfeld to Detroit (American) as part of a conditional deal.
The Cincinnati Reds returned Emil Frisk to Detroit (American) following previous purchase.
Jack Harper assigned the Cleveland Spiders to the St. Louis Cardinals. (Date given is approximate. Exact date is uncertain.)
The Philadelphia Phillies purchased Tully Sparks from the Pittsburgh Pirates.
The Boston Beaneaters purchased Shad Barry from the Washington Senators for $7,500.
The Chicago Orphans purchased Cupid Childs from the St. Louis Cardinals.
The New York Giants purchased Pink Hawley from the Cincinnati Reds.
The Pittsburgh Pirates released Bill Hoffer. (Date given is approximate. Exact date is uncertain.)
Harry Howell assigned the Baltimore Orioles to the Brooklyn Superbas.
Indianapolis (American) purchased Mike Kelley from the Pittsburgh Pirates. (Date given is approximate. Exact date is uncertain.)
The Cleveland Blues purchased Kit McKenna from the Brooklyn Superbas for $3,000.
Indianapolis (American) obtained Doc Powers who was previously under league control. (Date given is approximate. Exact date is uncertain.)
The Pittsburgh Pirates traded Heinie Reitz to Milwaukee (American Association) for . Milwaukee (American Association) sent Harry Smith (September, 1900) to the Pittsburgh Pirates to complete the trade.
Toronto (Eastern) purchased Mike Roach from the Washington Senators. (Date given is approximate. Exact date is uncertain.)
Syracuse (Eastern) purchased Zeke Wrigley from the Brooklyn Superbas.
Milwaukee (American) purchased Tully Sparks from the Philadelphia Phillies.
Dave Fultz assigned the Baltimore Orioles to the Brooklyn Superbas.
Frank Bowerman assigned the Pittsburgh Pirates to the New York Giants.
Jack Chesbro assigned the Louisville Colonels to the Pittsburgh Pirates.
The Chicago Orphans purchased Bert Cunningham from the Pittsburgh Pirates.
Bill Keister assigned the Baltimore Orioles to the Brooklyn Superbas.
The St. Louis Cardinals purchased Dan McGann from the Washington Senators for $5,000.
Joe McGinnity assigned the Baltimore Orioles to the Brooklyn Superbas.
The Brooklyn Superbas purchased Gus Weyhing from the St. Louis Cardinals for $500.
Charlie Hemphill assigned the Cleveland Spiders to the St. Louis Cardinals. (Date given is approximate. Exact date is uncertain.)
The St. Louis Cardinals purchased Bill Keister from the Brooklyn Superbas for $19,000.
Dan McFarlan assigned the Washington Senators to the New York Giants.
Jimmy Slagle assigned the Washington Senators to the Philadelphia Phillies for $750 or $1500.
The Boston Beaneaters released Jouett Meekin.
Indianapolis (American) purchased Art Madison from the Pittsburgh Pirates. (Date given is approximate. Exact date is uncertain.)
The New York Giants purchased Charlie Frisbee from the Boston Beaneaters.
The New York Giants purchased Charlie Hickman from the Boston Beaneaters.
Milwaukee (American) purchased John Anderson from the Brooklyn Superbas.
Milwaukee (American) purchased Dave Fultz from the Brooklyn Superbas.
Detroit (American) purchased Jack O'Brien from the Washington Senators for $1,750.
The New York Giants purchased Kip Selbach from the Cincinnati Reds.
The Chicago White Sox purchased Steve Brodie from the Brooklyn Superbas.
The St. Louis Cardinals released Harry Colliflower.
The Cincinnati Reds returned Jack Cronin to Detroit (American) following previous purchase. (Date given is approximate. Exact date is uncertain.)
The St. Louis Cardinals released Jim Duncan.
The Pittsburgh Pirates released Paddy Fox.
The Detroit Tigers purchased Dick Harley from the St. Louis Cardinals.
The Pittsburgh Pirates released John O'Brien.
The St. Louis Cardinals released Joe Sugden.
The Philadelphia Phillies purchased Harry Wolverton from the Chicago Orphans.
The Pittsburgh Pirates purchased Duff Cooley from the Philadelphia Phillies for $1,000.
The Brooklyn Superbas purchased Lave Cross from the St. Louis Cardinals for $3,000. (Date given is approximate. Exact date is uncertain.)
Kansas City (American) traded John Ganzel to the Chicago Orphans for Sam Dungan, Bill Everitt and Bill Phyle.
The Pittsburgh Pirates purchased Jack O'Connor from the St. Louis Cardinals for $2,000.
The Boston Beaneaters purchased Nig Cuppy from the St. Louis Cardinals.
The Cincinnati Reds purchased Topsy Hartsel from Indianapolis (American).
The New York Giants purchased Christy Mathewson from Norfolk (Virginia-North Carolina).
The Pittsburgh Pirates released Jouett Meekin.
The Pittsburgh Pirates loaned Rube Waddell to Milwaukee (American).
The St. Louis Cardinals released Gus Weyhing. (Date given is approximate. Exact date is uncertain.)
The Pittsburgh Pirates released Duff Cooley.
The Chicago Orphans purchased Tom Hughes from Omaha (Western).
The Chicago Orphans purchased Johnny Kling from St. Joseph (Western).
The Brooklyn Superbas signed Gus Weyhing as a free agent.
The Chicago Orphans released Billy Clingman. (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds loaned Elmer Smith to the New York Giants.
Roger Bresnahan sent from ??? to the Chicago Orphans in an unknown transaction.
Rube Waddell returned to the Pittsburgh Pirates by Milwaukee (American) as part of earlier loan. (Date given is approximate. Exact date is uncertain.)
Joe Connor sent from Bridgeport (Connecticut State) to the Boston Beaneaters in an unknown transaction. (Date given is approximate. Exact date is uncertain.)
The New York Giants released Tommy Sheehan.
The Chicago Orphans released Roger Bresnahan.
The Brooklyn Superbas drafted John Anderson from Milwaukee (American) in the 1900 rule 5 draft.
The Brooklyn Superbas drafted Dave Fultz from Milwaukee (American) in the 1900 rule 5 draft.
The Cincinnati Reds drafted Hobe Ferris from Norwich (Connecticut State) in the 1900 rule 5 draft.
Previous purchase of Topsy Hartsel by the Cincinnati Reds from Indianapolis (American) voided and player returned.
Topsy Hartsel assigned Indianapolis (American) to the Chicago Orphans.
Christy Mathewson assigned the New York Giants to Norfolk (Virginia-North Carolina). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds drafted Christy Mathewson from Norfolk (Virginia-North Carolina) in the 1900 rule 5 draft. (Date given is approximate. Exact date is uncertain.)
The New York Giants traded Amos Rusie to the Cincinnati Reds for Christy Mathewson.
Jimmy Barrett jumped from the Cincinnati Reds to the Detroit Tigers.
Bill Bernhard jumped from the Philadelphia Phillies to the Philadelphia Athletics.
Bill Bradley jumped from the Chicago Orphans to the Cleveland Blues.
The Pittsburgh Pirates purchased Kitty Bransfield from Worcester (Eastern).
The Baltimore Orioles signed Roger Bresnahan as a free agent.
Fritz Buelow jumped from the St. Louis Cardinals to the Detroit Tigers.
Nixey Callahan jumped from the Chicago Orphans to the Chicago White Sox.
Doc Casey jumped from the Brooklyn Superbas to the Detroit Tigers.
Billy Clingman sent from ??? to the Washington Senators in an unknown transaction.
Joe Connor jumped from the Boston Beaneaters to the Milwaukee Brewers.
Lou Criger jumped from the St. Louis Cardinals to the Boston Americans.
Lave Cross jumped from the Brooklyn Superbas to the Philadelphia Athletics.
Nig Cuppy jumped from the Boston Beaneaters to the Boston Americans.
The Philadelphia Athletics signed Lefty Davis as a free agent.
Mike Donlin jumped from the St. Louis Cardinals to the Baltimore Orioles.
Hugh Duffy jumped from the Boston Beaneaters to the Milwaukee Brewers.
Bill Everitt jumped from the Chicago Orphans to the Washington Senators.
Hobe Ferris jumped from the Cincinnati Reds to the Boston Americans.
Chick Fraser jumped from the Philadelphia Phillies to the Philadelphia Athletics.
Phil Geier jumped from the Cincinnati Reds to the Philadelphia Athletics.
Kid Gleason jumped from the New York Giants to the Detroit Tigers.
Mike Grady jumped from the New York Giants to the Washington Senators.
Clark Griffith jumped from the Chicago Orphans to the Chicago White Sox.
Bill Hallman jumped from the Cleveland Blues to the Philadelphia Phillies.
Zaza Harvey jumped from the Chicago Orphans to the Chicago White Sox.
Pink Hawley jumped from the New York Giants to the Milwaukee Brewers.
Harry Howell jumped from the Brooklyn Superbas to the Baltimore Orioles.
Fielder Jones jumped from the Brooklyn Superbas to the Chicago White Sox.
Nap Lajoie jumped from the Philadelphia Phillies to the Philadelphia Athletics.
Ted Lewis jumped from the Boston Beaneaters to the Boston Americans.
Jack McCarthy jumped from the Chicago Orphans to the Cleveland Blues.
Joe McGinnity jumped from the Brooklyn Superbas to the Baltimore Orioles.
The Baltimore Orioles signed John McGraw as a free agent.
Win Mercer jumped from the New York Giants to the Washington Senators.
Sam Mertes jumped from the Chicago Orphans to the Chicago White Sox.
The Cleveland Blues purchased Earl Moore from Dayton (Interstate).
The Boston Beaneaters purchased Pat Moran from Montreal (Eastern).
Jerry Nops jumped from the Brooklyn Superbas to the Baltimore Orioles.
Wiley Piatt jumped from the Philadelphia Phillies to the Philadelphia Athletics.
Joe Quinn jumped from the Cincinnati Reds to the Washington Senators.
The Baltimore Orioles signed Wilbert Robinson as a free agent.
The St. Louis Cardinals purchased Pop Schriver from the Pittsburgh Pirates.
Ed Scott jumped from the Cincinnati Reds to the Cleveland Blues.
Cy Seymour jumped from the New York Giants to the Baltimore Orioles.
Elmer Smith returned to the Cincinnati Reds by the New York Giants as part of earlier loan.
Chick Stahl jumped from the Boston Beaneaters to the Boston Americans.
Gus Weyhing jumped from the Brooklyn Superbas to the Cleveland Blues.
The Philadelphia Phillies signed Doc White as an amateur free agent.
Jimmy Williams jumped from the Pittsburgh Pirates to the Baltimore Orioles.
Bob Wood jumped from the Cincinnati Reds to the Cleveland Blues.
Joe Yeager jumped from the Brooklyn Superbas to the Detroit Tigers.
Stan Yerkes jumped from the Baltimore Orioles to the St. Louis Cardinals.
The Detroit Tigers purchased Pop Dillon from the Pittsburgh Pirates.
The New York Giants traded Jack Doyle to the Chicago Orphans for John Ganzel, Ned Garvin and Sammy Strang.
The Boston Beaneaters signed Bob Lawson as a free agent.
John Anderson jumped from the Brooklyn Superbas to the Milwaukee Brewers. (Date given is approximate. Exact date is uncertain.)
The Boston Beaneaters purchased Gene DeMontreville from the Brooklyn Superbas.
Jimmy Collins jumped from the Boston Beaneaters to the Boston Americans.
Dave Fultz jumped from the Brooklyn Superbas to the Philadelphia Athletics.
Ned Garvin jumped from the New York Giants to the Milwaukee Brewers. (Date given is approximate. Exact date is uncertain.)
Harry Smith jumped from the Pittsburgh Pirates to the Philadelphia Athletics.
The Cincinnati Reds released Elmer Smith.
The Pittsburgh Pirates signed Elmer Smith as a free agent.
Charlie Hemphill jumped from the St. Louis Cardinals to the Boston Americans.
Boileryard Clarke jumped from the Boston Beaneaters to the Washington Senators. (Date given is approximate. Exact date is uncertain.)
Bill Carrick jumped from the New York Giants to the Washington Senators.
Freddy Parent jumped from Providence (Eastern) to the Boston Americans.
Buck Freeman jumped from the Boston Beaneaters to the Boston Americans.
Bill Keister jumped from the St. Louis Cardinals to the Baltimore Orioles.
Billy Sullivan jumped from the Boston Beaneaters to the Chicago White Sox.
Cy Young jumped from the St. Louis Cardinals to the Boston Americans.
The Milwaukee Brewers signed Tom Leahy as a free agent.
Lefty Davis jumped from the Philadelphia Athletics to the Brooklyn Superbas. (Date given is approximate. Exact date is uncertain.)
The Boston Beaneaters signed Daff Gammons as an amateur free agent.