1920 Major League Baseball season

Red Sox

White Sox

Indians

Tigers

Athletics

Browns

Yankees

Senators

Locations of teams for the 1915–1922 American League seasons
American League

Braves

Robins

Cubs

Reds

Giants

Phillies

Pirates

Cardinals

Locations of teams for the 1920–1931 National League seasons
National League

The 1920 Major League Baseball season began on April 14, 1920. The regular season ended on October 3, with the Brooklyn Robins and Cleveland Indians as the regular season champions of the National League and American League, respectively. The postseason began with Game 1 of the 17th World Series on October 5 and ended with Game 7 on October 12. The Indians defeated the Robins, five games to two.

This was the final season to be presided over by the three-person National Baseball Commission, which ran the major and minor leagues—composed of the American League President, National League President, and one team owner as president. In the wake of the Black Sox scandal, the credibility of baseball had been tarnished with the public and fans and the owners of the teams clamored for credibility to be restored. The owners felt that creating one position with near-unlimited authority was the answer. After the season, the commission was replaced with the newly created office of Commissioner of Baseball.