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National Football League
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The National Football League is a professional American football league consisting of 32 teams, divided equally between the National Football Conference and the American Football Conference. The NFL is one of the four professional sports leagues in North America. The NFLs 17-week regular season runs from the week after Labor Day to the week after Christmas, with each team playing 16 games, the NFL was formed in 1920 as the American Professional Football Association before renaming itself the National Football League for the 1922 season. The NFL agreed to merge with the American Football League in 1966, and the first Super Bowl was held at the end of that season, the merger was completed in 1970. Today, the NFL has the highest average attendance of any sports league in the world and is the most popular sports league in the United States. S. The NFLs executive officer is the commissioner, who has authority in governing the league. The team with the most NFL championships is the Green Bay Packers with thirteen, the current NFL champions are the New England Patriots, who defeated the Atlanta Falcons 34–28 in Super Bowl LI. Another meeting held on September 17,1920 resulted in the renaming of the league to the American Professional Football Association, the league hired Jim Thorpe as its first president, and consisted of 14 teams. Only two of these teams, the Decatur Staleys and the Chicago Cardinals, remain, the first event occurred on September 26,1920 when the Rock Island Independents defeated the non-league St. Paul Ideals 48–0 at Douglas Park. On October 3,1920, the first full week of league play occurred, the following season resulted in the Chicago Staleys controversially winning the title over the Buffalo All-Americans. In 1922, the APFA changed its name to the National Football League, in 1932, the season ended with the Chicago Bears and the Portsmouth Spartans tied for first in the league standings. This method had used since the leagues creation in 1920. The league quickly determined that a game between Chicago and Portsmouth was needed to decide the leagues champion. Playing with altered rules to accommodate the playing field, the Bears won the game 9–0. Fan interest in the de facto championship game led the NFL, beginning in 1933, the 1934 season also marked the first of 12 seasons in which African Americans were absent from the league. The de facto ban was rescinded in 1946, following public pressure, the NFL was always the foremost professional football league in the United States, it nevertheless faced a large number of rival professional leagues through the 1930s and 1940s. Rival leagues included at least three separate American Football Leagues and the All-America Football Conference, on top of regional leagues of varying caliber. Three NFL teams trace their histories to these leagues, including the Los Angeles Rams
