1900: The American League is organized

(Wikipedia) The History of the American League, officially known as the American League of Professional Baseball Clubs and often abbreviated AL, stretches back into the late-19th century. The American League is one of the two leagues that makes up Major League Baseball. Originally a minor league known as the Western League, the league later developed into a major league after the American Association disbanded. Continued

Pictured: The 1921 Baltimore Orioles