| "ALT","Altoona Mountain City","N", |
| "ANA","Los Angeles Angels of Anaheim","Y", |
| "ARI","Arizona Diamondbacks","Y", |
| "ATH","Philadelphia Athletics","N","PNA" |
| "ATL","Atlanta Braves","Y","BNA" |
| "BAL","Baltimore Orioles","Y", |
| "BFB","Buffalo Bisons","N", |
| "BFL","Buffalo Bisons","N", |
| "BLC","Baltimore Canaries","NA", |
| "BLO","Baltimore Orioles","N", |
| "BLT","Baltimore Terrapins","N", |
| "BLU","Baltimore Monumentals","N", |
| "BNA","Boston Red Stockings","NA","ATL" |
| "BOS","Boston Red Sox","Y", |
| "BRA","Brooklyn Atlantics","NA", |
| "BRD","Boston Reds","N", |
| "BRG","Brooklyn Gladiators","N", |
| "BRS","Boston Reds","N", |
| "BTT","Brooklyn Tip-Tops","N", |
| "BUF","Buffalo Bisons","N", |
| "BWW","Brooklyn Ward's Wonders","N", |
| "CBK","Columbus Buckeyes","N", |
| "CBL","Cleveland Blues","N", |
| "CEN","Philadelphia Centennials","NA", |
| "CFC","Cleveland Forest Citys","NA", |
| "CHC","Chicago Cubs","Y","CNA" |
| "CHH","Chicago Whales","N", |
| "CHP","Chicago Pirates","N", |
| "CHW","Chicago White Sox","Y", |
| "CIN","Cincinnati Reds","Y", |
| "CKK","Cincinnati Kelly's Killers","N", |
| "CLE","Cleveland Indians","Y", |
| "CLI","Cleveland Infants","N", |
| "CLS","Columbus Solons","N", |
| "CLV","Cleveland Spiders","N", |
| "CNA","Chicago White Stockings","NA","CHC" |
| "CNR","Cincinnati Reds","N", |
| "COL","Colorado Rockies","Y", |
| "COR","Cincinnati Outlaw Reds","N", |
| "CPI","Chicago/Pittsburgh (Union League)","N", |
| "DET","Detroit Tigers","Y", |
| "DTN","Detroit Wolverines","N", |
| "ECK","Brooklyn Eckfords","NA", |
| "FLA","Florida Marlins","Y", |
| "HAR","Hartford Dark Blues","N","HNA" |
| "HNA","Hartford Dark Blues","NA","HAR" |
| "HOU","Houston Astros","Y", |
| "IBL","Indianapolis Blues","N", |
| "IHO","Indianapolis Hoosiers","N", |
| "IND","Indianapolis Hoosiers","N", |
| "KCC","Kansas City Cowboys","N", |
| "KCN","Kansas City Cowboys","N", |
| "KCP","Kansas City Packers","N", |
| "KCR","Kansas City Royals","Y", |
| "KCU","Kansas City Cowboys","N", |
| "KEK","Fort Wayne Kekiongas","NA", |
| "LAD","Los Angeles Dodgers","Y", |
| "LGR","Louisville Grays","N", |
| "LOU","Louisville Colonels","N", |
| "MAN","Middletown Mansfields","NA", |
| "MAR","Baltimore Marylands","NA", |
| "MIL","Milwaukee Brewers","Y", |
| "MIN","Minnesota Twins","Y", |
| "MLA","Milwaukee Brewers","N", |
| "MLG","Milwaukee Grays","N", |
| "MLU","Milwaukee Brewers","N", |
| "NAT","Washington Nationals","NA", |
| "NEW","Newark Pepper","N", |
| "NHV","New Haven Elm Citys","NA", |
| "NNA","New York Mutuals","NA","NYU" |
| "NYI","New York Giants","N", |
| "NYM","New York Mets","Y", |
| "NYP","New York Metropolitans","N", |
| "NYU","New York Mutuals","N","NNA" |
| "NYY","New York Yankees","Y", |
| "OAK","Oakland Athletics","Y", |
| "OLY","Washington Olympics","NA", |
| "PBB","Pittsburgh Burghers","N", |
| "PBS","Pittsburgh Rebels","N", |
| "PHA","Philadelphia Athletics","N", |
| "PHI","Philadelphia Phillies","Y", |
| "PHK","Philadelphia Keystones","N", |
| "PHQ","Philadelphia Athletics","N", |
| "PIT","Pittsburgh Pirates","Y", |
| "PNA","Philadelphia Athletics","NA","ATH" |
| "PRO","Providence Grays","N", |
| "PWS","Philadelphia White Stockings","NA", |
| "RES","Elizabeth Resolutes","NA", |
| "RIC","Richmond Virginians","N", |
| "ROC","Rochester Broncos","N", |
| "ROK","Rockford Forest Citys","NA", |
| "SBS","St. Louis Brown Stockings","N","SNA" |
| "SDP","San Diego Padres","Y", |
| "SEA","Seattle Mariners","Y", |
| "SFG","San Francisco Giants","Y", |
| "SLI","St. Louis Terriers","N", |
| "SLM","St. Louis Maroons","N", |
| "SLR","St. Louis Red Stockings","NA", |
| "SNA","St. Louis Brown Stockings","NA","SBS" |
| "STL","St. Louis Cardinals","Y", |
| "STP","St. Paul Apostles","N", |
| "SYR","Syracuse Stars","N", |
| "SYS","Syracuse Stars","N", |
| "TBD","Tampa Bay Rays","Y", |
| "TEX","Texas Rangers","Y", |
| "TLM","Toledo Maumees","N", |
| "TOL","Toledo Blue Stockings","N", |
| "TOR","Toronto Blue Jays","Y", |
| "TRO","Troy Haymakers","NA", |
| "TRT","Troy Trojans","N", |
| "WAS","Washington Senators","N", |
| "WBL","Washington Blue Legs","NA", |
| "WES","Keokuk Westerns","NA", |
| "WIL","Wilmington Quicksteps","N", |
| "WNA","Washington Nationals","N", |
| "WNL","Washington Nationals","N", |
| "WNT","Washington Nationals","NA", |
| "WOR","Worcester Ruby Legs","N", |
| "WSN","Washington Nationals","Y", |
| "WST","Washington Statesmen","N", |