In 1971, the Athletics won the American League's West division, their first title of any kind since 1931, when they played in Philadelphia. They were swept in three games in the American League Championship Series by the Baltimore Orioles. The A's won the division again in 1972; their series with the Tigers went the full five games, and Jackson scored the tying run in the clincher on a steal of home. In the process, however, he tore a hamstring and was unable to play in the World Series. The A's still managed to defeat the Cincinnati Reds in seven games. It was the first championship won by a San Francisco Bay Area team in any major league sport.