The 1990 World Series was won by the Cincinnati Reds, a Major League Baseball team based in Cincinnati, Ohio. The Reds defeated the Oakland Athletics in four games to win their fifth championship in franchise history. The Reds were led by manager Lou Piniella and featured stars such as Barry Larkin, Chris Sabo, and Jose Rijo. The series was notable for its dramatic Game 2, which ended with a walk-off home run by Reds outfielder Billy Hatcher.