1926 New York Yankees

Each 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. The pennant was presented to the team with the best win–loss record each year through the 1968 season, after which the American League Championship Series (ALCS) was introduced to decide the pennant winner. In 1969, the league split into two divisions, and the teams with the best records in each division played one another in the five-game ALCS to determine the pennant winner, who received (and continues to receive) the William Harridge Trophy. The New York Yankees (1926 team pictured) have won 40 AL pennants. This total is more than twice that of the next-closest team, the Oakland Athletics, who have won 15. They are followed by the Boston Red Sox and the Detroit Tigers, with 14 and 11 pennants won respectively. (Full list...)