American League (AL) (1901-1902)

The American League of Professional Baseball Clubs, or simply the American League (AL), is one of two leagues that make up Major League Baseball (MLB) in the United States and Canada. It developed from the Western League, a minor league based in the Great Lakes states, which eventually aspired to major league status. It is sometimes called the Junior Circuit because it claimed Major League status for the 1901 season, 25 years after the formation of the National League (the "Senior Circuit").

For American League players after 1902 see Major League Baseball.

American League teams before 1903.

• Baltimore Orioles (1901-1902) (Replaced by the New York Yankees)
• Boston Americans (became the Boston Red Sox in 1908)
• Chicago White Stockings (became the Chicago White Sox in 1903)
• Cleveland Blues/Bluebirds (became the Cleveland Indians in 1915)
• Detroit Tigers
• Milwaukee Brewers (became the St. Louis Browns in 1902 and the Baltimore Orioles in 1954)
• Philadelphia Athletics (became the Kansas City Athletics in 1955 and the Oakland Athletics in 1968)
• Washington Senators (became the Minnesota Twins in 1961)