The Basketball Association of America was founded in 1946 by the owners of the major ice hockey arenas in the Northeastern and Midwestern United States and Canada. On November 1, 1946, in Toronto, Ontario, Canada, the Toronto Huskies hosted the New York Knickerbockers at Maple Leaf Gardens, which the NBA now regards as the first game played in the league's history.
In 1920 representatives of several professional American football leagues and independent teams founded the American Professional Football Conference, soon renamed the National Football League. The first official championship game was held in 1933. By 1958, when that season's NFL championship game became known as "The Greatest Game Ever Played", the NFL was on its way to becoming one of the most popular sports leagues in the United States.
Major League Baseball 1869—the year the first professional teamthe Cincinnati Red Stockings, was established—and held official celebrations for its 100th anniversary in 1969 and its 125th anniversary in 1994, both of which were commemorated with league-wide shoulder patches. The modern Chicago Cubs and Atlanta Braves franchises trace their histories back to the National Association of Professional Base Ball Players in the early 1870s. Many believe that the formation of the National League in 1876 is the beginning of Major League Baseball.