The 1890 Louisville Colonels baseball team finished with an 88–44 record and won the American Association championship.
After the season, Louisville played the NL champions, the Brooklyn Bridegrooms, in the 1890 World Series.
Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg.
= Batting average; HR = Home runs; RBI = Runs batted in Note: G = Games pitched; GS = Games started; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts Louisville, champions of the American Association, played the National League champions, the Brooklyn Bridegrooms in the 1890 World Series.
After Brooklyn won the first game at home to take a 3–1 lead, Louisville came back to win two straight.