Transactions listed are from November 1 of previous year to April 1 of the following year.
The Washington Senators traded Heinie Reitz to the Pittsburgh Pirates for Jack O'Brien, Dick Padden and Jimmy Slagle.
The Philadelphia Phillies purchased Chick Fraser from the Cleveland Spiders for $900 or $1000.
The Cincinnati Reds purchased Kip Selbach from the Washington Senators for $5,000.
The Louisville Colonels drafted Deacon Phillippe from Minneapolis (Western) in the 1899 rule 5 draft.
The Boston Beaneaters purchased Oscar Streit from Dayton (Interstate).
The Louisville Colonels loaned Rube Waddell to Columbus-Grand Rapids (Western).
The Pittsburgh Pirates purchased Jimmy Williams from Kansas City (Western).
Cy Young assigned the Cleveland Spiders to the St. Louis Perfectos.
The Chicago Orphans sent Walt Woods to the Louisville Colonels as part of a conditional deal.
The Baltimore Orioles traded Gene DeMontreville to the Chicago Orphans for Bill Dahlen.
The Boston Beaneaters purchased Boileryard Clarke from the Baltimore Orioles.
Bill Dahlen assigned the Baltimore Orioles to the Brooklyn Superbas.
The Cleveland Spiders purchased Mike Griffin from the Brooklyn Superbas for $4,000.
Harry Howell assigned the Brooklyn Superbas to the Baltimore Orioles.
Frank Bates assigned the Cleveland Spiders to the St. Louis Perfectos.
Kid Carsey assigned the St. Louis Perfectos to the Cleveland Spiders.
The Baltimore Orioles traded Aleck Smith to the Brooklyn Superbas for Pat Crisham and George Magoon.
Dan McFarlan assigned the Baltimore Orioles to the Brooklyn Superbas. (Date given is approximate. Exact date is uncertain.)
The Pittsburgh Pirates loaned Tom O'Brien to the New York Giants.
The Brooklyn Superbas traded Pete Cassidy, Mike Heydon, Dan McFarlan and $2,500 to the Washington Senators for Doc Casey and Duke Farrell.
The Washington Senators released Frank Killen.
The Boston Beaneaters signed Frank Killen as a free agent.
The Boston Beaneaters released Fred Klobedanz.
The Boston Beaneaters released Oscar Streit.
The Cleveland Spiders released Jack Clements.
The St. Louis Perfectos purchased Charlie Hemphill from Grand Rapids (Western).
Frank Bates assigned the St. Louis Perfectos to the Cleveland Spiders.
Lave Cross assigned the Cleveland Spiders to the St. Louis Perfectos.
The Pittsburgh Pirates purchased John O'Brien from the Baltimore Orioles.
Indianapolis (Western) purchased Topsy Hartsel from the Louisville Colonels.
The Boston Beaneaters signed Harvey Bailey as a free agent.
The Philadelphia Phillies purchased Bill Magee from the Louisville Colonels for $3,250.
The Pittsburgh Pirates purchased Jack Chesbro from Richmond (Atlantic).
The Louisville Colonels released Harry Croft. (Date given is approximate. Exact date is uncertain.)
The Philadelphia Phillies released Dave Fultz.
The Washington Senators traded Deacon McGuire to the Brooklyn Superbas for Dan McGann and Aleck Smith.
Jack Fifield assigned the Philadelphia Phillies to Minneapolis (Western).
The Baltimore Orioles signed Dave Fultz as a free agent.
The Cincinnati Reds released Farmer Vaughn.
The Philadelphia Phillies signed Harry Croft as a free agent.
The Boston Beaneaters released Frank Killen.
The Cincinnati Reds released Jake Stenzel.
The Cincinnati Reds purchased Jimmy Barrett from Detroit (Western).
The Brooklyn Superbas purchased Erve Beck from Toledo (Interstate).
Detroit (Western) sent Kid Elberfeld to the Cincinnati Reds as part of a conditional deal.
The Cincinnati Reds purchased Emil Frisk from Detroit (Western).
The Brooklyn Superbas released Al Maul.
The Baltimore Orioles traded George Magoon to the Chicago Orphans for Gene DeMontreville.
The Baltimore Orioles traded Gene DeMontreville and Jerry Nops to the Brooklyn Superbas for Hughie Jennings. Gene DeMontreville, Hughie Jennings and Jerry Nops returned to original teams on August 8, 1899.
Charlie Hemphill assigned the St. Louis Perfectos to the Cleveland Spiders.
The Cincinnati Reds purchased Socks Seybold from Richmond (Atlantic).
The Pittsburgh Pirates released Willie Clark.
The Baltimore Orioles purchased Aleck Smith from the Washington Senators. (Date given is approximate. Exact date is uncertain.)
The Brooklyn Superbas traded to the Baltimore Orioles for . Gene DeMontreville, Hughie Jennings and Jerry Nops returned to original teams on August 8, 1899. (Date given is approximate. Exact date is uncertain.)
The Chicago Orphans purchased Bill Bradley from Troy (New York State).
The Boston Beaneaters purchased Jouett Meekin from the New York Giants for $5000 (probably much lower or even free).
The Boston Beaneaters released General Stafford.
The Philadelphia Phillies released Bill Magee. (Date given is approximate. Exact date is uncertain.)
The Washington Senators signed General Stafford as a free agent.
The Washington Senators released Charlie Atherton.
The Washington Senators released Frank Bonner.
Kansas City (Western) purchased Bill Coughlin from the Washington Senators.
The Washington Senators released Jim Duncan.
The St. Louis Perfectos released Dusty Miller.
The Boston Beaneaters traded a player to be named later and $1,000 to Grand Rapids (Western) for a player to be named later and Billy Sullivan. The Boston Beaneaters sent Charlie Frisbee (November, 1899) to Grand Rapids (Western) to complete the trade.
The Boston Beaneaters released Kitty Bransfield.
Milwaukee (American) purchased Wid Conroy from Cortland (New York State).
The Pittsburgh Pirates purchased Pop Dillon from Buffalo (Western) for $1,500.
Doc Newton sent from Indianapolis (Western) to the Cincinnati Reds in an unknown transaction.
The Boston Beaneaters released George Yeager.
The Washington Senators released Kid Carsey.
The Boston Beaneaters purchased Mike Hickey from Manchester (New England). (Date given is approximate. Exact date is uncertain.)
The Cincinnati Reds purchased Sam Crawford from Grand Rapids (Western).
The Pittsburgh Pirates purchased Chummy Gray from Buffalo (Western) for $1,000.
The New York Giants signed Jay Parker as a free agent.
Rube Waddell returned to the Louisville Colonels by Columbus-Grand Rapids (Western) as part of earlier loan. (Date given is approximate. Exact date is uncertain.)
The Washington Senators signed Bill Magee as a free agent. (Date given is approximate. Exact date is uncertain.)
The Washington Senators purchased Doc Powers from the Louisville Colonels.
The Cincinnati Reds purchased Jack Cronin from Detroit (Western).
The Chicago Orphans released Doc Curley.
The St. Louis Perfectos purchased Fritz Buelow from Detroit (Western).
Tom O'Brien returned to the Pittsburgh Pirates by the New York Giants as part of earlier loan.
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.