The White Sox are one of two major league teams based in Chicago, the other being the Chicago Cubs of the National League. Both clubs are charter members of their respective leagues.
The White Sox were a frequent contender during the early 20th century, winning 5 of the first 19 league pennants; but the team's fortunes dropped precipitously in the aftermath of the 1919 "Black Sox" scandal. After winning only one league championship in the years spanning 1920 to 2004, the team ended decades (and generations) of frustration in 2005 when it won its first World Series Championship since 1917.
All-time regular season record (1901-2005): 8210 won - 8020 lost - 101 tied - 3 no-decision