<Li> AA = American Association </Li> <Li> UA = Union Association </Li> <Table> <Tr> <Th> Season </Th> <Th> Franchise </Th> <Th> League </Th> <Th> Wins </Th> <Th> Losses </Th> <Th> Pct . </Th> <Th> Finish </Th> </Tr> <Tr> <Td> 1906 </Td> <Td> Chicago Cubs </Td> <Td> NL </Td> <Td> 116 </Td> <Td> 36 </Td> <Td>. 763 </Td> <Td> Lost 1906 World Series </Td> </Tr> <Tr> <Td> 1884 </Td> <Td> St. Louis Maroons </Td> <Td> UA </Td> <Td> 94 </Td> <Td> 19 </Td> <Td>. 832 </Td> <Td> Union Association Champions </Td> </Tr> <Tr> <Td> 1902 </Td> <Td> Pittsburgh Pirates </Td> <Td> NL </Td> <Td> 103 </Td> <Td> 36 </Td> <Td>. 741 </Td> <Td> National League Champions </Td> </Tr> <Tr> <Td> 1886 </Td> <Td> Chicago White Stockings </Td> <Td> NL </Td> <Td> 90 </Td> <Td> 34 </Td> <Td>. 726 </Td> <Td> Lost 1886 World Series </Td> </Tr> <Tr> <Td> 1909 </Td> <Td> Pittsburgh Pirates </Td> <Td> NL </Td> <Td> 110 </Td> <Td> 42 </Td> <Td>. 724 </Td> <Td> Won 1909 World Series </Td> </Tr> <Tr> <Td> 1954 </Td> <Td> Cleveland Indians </Td> <Td> AL </Td> <Td> 111 </Td> <Td> 43 </Td> <Td>. 721 </Td> <Td> Lost 1954 World Series </Td> </Tr> <Tr> <Td> </Td> <Td> Seattle Mariners </Td> <Td> AL </Td> <Td> 116 </Td> <Td> 46 </Td> <Td>. 716 </Td> <Td> Lost 2001 ALCS </Td> </Tr> <Tr> <Td> 1927 </Td> <Td> New York Yankees </Td> <Td> AL </Td> <Td> 110 </Td> <Td> 44 </Td> <Td>. 714 </Td> <Td> Won 1927 World Series </Td> </Tr> <Tr> <Td> 1886 </Td> <Td> Detroit Wolverines </Td> <Td> NL </Td> <Td> 87 </Td> <Td> 36 </Td> <Td>. 707 </Td> <Td> 2nd place in National League </Td> </Tr> <Tr> <Td> 1897 </Td> <Td> Boston Beaneaters </Td> <Td> NL </Td> <Td> 93 </Td> <Td> 39 </Td> <Td>. 705 </Td> <Td> Lost 1897 Temple Cup </Td> </Tr> <Tr> <Td> 1907 </Td> <Td> Chicago Cubs </Td> <Td> NL </Td> <Td> 107 </Td> <Td> 45 </Td> <Td>. 704 </Td> <Td> Won 1907 World Series </Td> </Tr> <Tr> <Td> 1931 </Td> <Td> Philadelphia Athletics </Td> <Td> AL </Td> <Td> 107 </Td> <Td> 45 </Td> <Td>. 704 </Td> <Td> Lost 1931 World Series </Td> </Tr> <Tr> <Td> 1998 </Td> <Td> New York Yankees </Td> <Td> AL </Td> <Td> 114 </Td> <Td> 48 </Td> <Td>. 704 </Td> <Td> Won 1998 World Series </Td> </Tr> <Tr> <Td> 1887 </Td> <Td> St. Louis Browns </Td> <Td> AA </Td> <Td> 95 </Td> <Td> 40 </Td> <Td>. 704 </Td> <Td> Lost 1887 World Series </Td> </Tr> <Tr> <Td> 1939 </Td> <Td> New York Yankees </Td> <Td> AL </Td> <Td> 106 </Td> <Td> 45 </Td> <Td>. 702 </Td> <Td> Won 1939 World Series </Td> </Tr> </Table> <Tr> <Th> Season </Th> <Th> Franchise </Th> <Th> League </Th> <Th> Wins </Th> <Th> Losses </Th> <Th> Pct . </Th> <Th> Finish </Th> </Tr>

Most wins in mlb season by a team