AA-M # BAM BOM BRM CIM CLM CMM INM KCM LOM MLM NYM PHM PIM RIM ROM SLM SYM TLM WAM AA-M  
1882 6 Baltimore     Cincinnati         Louisville     Philadelphia Pittsburgh     St. Louis       1882                          
    Orioles     Red Stockings         Eclipse     Athletics Alleghenys     Brown Stockings                                  
1883 8 Baltimore     Cincinnati   Columbus     Louisville   New York Philadelphia Pittsburgh     St. Louis       1883  
    Orioles     Red Stockings   Buckeyes     Eclipse   Metropolitans Athletics Alleghenys     Browns          
1884 13 Baltimore   Brooklyn Cincinnati   Columbus Indianapolis   Louisville   New York Philadelphia Pittsburgh Richmond   St. Louis   Toledo Washington 1884                          
  Orioles   Atlantics Red Stockings   Buckeyes Hoosiers   Eclipse   Metropolitans Athletics Alleghenys Virginians   Browns   Blue Stockings Nationals                            
              Folded Folded             Folded       Left AA Folded                            
1885 8 Baltimore   Brooklyn Cincinnati         Louisville   New York Philadelphia Pittsburgh     St. Louis       1885  
    Orioles   Grays Red Stockings         Colonels   Metropolitans Athletics Alleghenys     Browns          
1886 8 Baltimore   Brooklyn Cincinnati         Louisville   New York Philadelphia Pittsburgh     St. Louis       1886                          
  Orioles   Grays Red Stockings         Colonels   Metropolitans Athletics Alleghenys     Browns                                  
                            to NL                                        
1887 8 Baltimore   Brooklyn Cincinnati Cleveland       Louisville   New York Philadelphia       St. Louis       1887  
    Orioles   Grays Red Stockings Blues       Colonels   Metropolitans Athletics       Browns          
                        Folded                                            
1888 8 Baltimore   Brooklyn Cincinnati Cleveland     Kansas City Louisville     Philadelphia       St. Louis       1888                          
  Orioles   Bridegrooms Red Stockings Blues     Cowboys Colonels     Athletics       Browns                                  
            to NL                                                        
1889 8 Baltimore   Brooklyn Cincinnati   Columbus (2)   Kansas City Louisville     Philadelphia       St. Louis       1889  
    Orioles   Bridegrooms Red Stockings   Solons   Cowboys Colonels     Athletics       Browns          
        to NL to NL       Folded                   from IL                              
1890 9 Baltimore   Brooklyn (a&2)     Columbus     Louisville     Philadelphia     Rochester St. Louis Syracuse Toledo (2)   1890                          
  Orioles   Gladiators     Solons     Colonels     Athletics     Broncos Browns Stars Maumees                              
        Folded                 Expelled     Bought Out   Folded Folded                              
      from PL                   from PL                                          
1891 9 Baltimore Boston   Cincinnati (2)   Columbus     Louisville Milwaukee (b)   Philadelphia (2)       St. Louis     Washington (2) 1891  
    Orioles Reds   Kelly's Killers   Solons     Colonels Brewers   Athletics       Browns     Statesmen    
    to NL Disbanded   Disbanded   Disbanded     to NL to Western League   Disbanded       to NL     to NL    
  Inaugural or first season in league at that location  
  Nickname changed from previous year
  Red Text Change nickname to match actual           
(a) - Second unique franchise in city. Folded August 25 and were replaced by Baltimore (who had previously dropped out of the AA following the 1889 season)
(b) - Finsihed season for Cincinnati
(2) - Second unique franchise in city