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