List of American League pennant winners

Every Major League Baseball (MLB) season, one American League (AL) team wins the pennant, signifying that they are the league's champion and have the right to play in the World Series against the champion of the National League (NL). The pennant was presented to the team with the best win–loss record each year through the 1968 season, after which the AL Championship Series (ALCS) was introduced to decide the pennant winner.

Source: Wikipedia — List of American League pennant winners (CC BY-SA 4.0)