Major professional sports league, or simply major league, is a term used in the United States and Canada for the highest professional competitions in team sports. The term "major league" was first used in 1921 in reference to Major League Baseball, the top level of professional American baseball.
The term is most commonly applied to Major League Baseball, the National Basketball Association, the National Football League, and the National Hockey League. These four leagues are also commonly referred to as the Big Four. Each of these is the richest professional club competition in its sport worldwide. The best players can become cultural icons in both countries and elsewhere in the world, because the leagues enjoy a significant place in popular culture in the U.S. and Canada.
In the United States and Canada, the term "major league" is usually limited to team sports, although individual sports such as golf, tennis, and auto racing are also very popular.


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