User:Jntg4Games/Major Leagues

American Football

 * National Football League (1922-)

Baseball

 * Major League Baseball (1905-)

Basketball

 * National Basketball Association (1949-)

Canadian Football

 * Canadian Football League (1958-)

Ice Hockey

 * National Hockey League (1917-)

Soccer

 * Major League Soccer (1996-)

American Football

 * American Professional Football Association (1920-1921) (=National Football League)
 * All-America Football Conference (1946-1949) (Merged with National Football League)
 * American Football League (1960-1969) (Merged with National Football League)
 * World Football League (1974-1975) (Folded)
 * United States Football League (1983-1985) (Folded)
 * XFL (2001) (Folded)

Baseball

 * National Association (1871-1875) (Folded)
 * National League (1876-1902) (Merged with American League as Major League Baseball)
 * American Association (1882-1891) (Merged with National League)
 * Union Association (1884) (Folded)
 * Players' National League (1890) (Folded)
 * American League (1901-1902) (Merged with National League as Major League Baseball)
 * Major League Baseball (1903) (Dissolved into American League and National League)
 * American League (1904) (Merged with National League as Major League Baseball)
 * National League (1904) (Merged with American League as Major League Baseball)
 * Federal League (1914-1915) (Folded)

Basketball

 * National Basketball League (1937-1949) (Merged with Basketball Association of America as National Basketball Association)
 * Basketball Association of America (1946-1949) (Merged with National Basketball League as National Basketball Association)
 * American Basketball Association (1967-1976) (Merged with National Basketball Association)

Ice Hockey

 * National Hockey Association (1910-1917) (Folded)
 * Pacific Coast Hockey Association (1911-1924) (Folded)
 * Western Canada Hockey League (1921-1925) (=Western Hockey League)
 * Western Hockey League (1925-1926) (Folded)
 * World Hockey Association (1972-1979) (Merged with National Hockey League)

Soccer

 * North American Soccer League (1968-1984)
 * North American Soccer League Indoor (1979-1984)