National Football League

The National Football League (NFL) is the largest professional American football league, consisting of thirty-two teams from American cities. The league was formed in 1920 as the American Professional Football Association, which adopted the name "National Football League" in 1922. The NFL is one of the major professional sports leagues of North America.

References

• Official NFL website
• NFL History - Champion and Award Lists
• "NFL Scores Nearly $18 Billion in TV Rights", by Stefan Fatsis and Kyle Pope, 14 January 1998, The Wall Street Journal (p. B1) http://subscribe.wsj.com/microexamples/articlefiles/NFLScoresNearly18BillionInTVRights.doc
• NFL Record and Fact Book (ISBN 193299436X)
• Total Football: The Official Encyclopedia of the National Football League (ISBN 0062701746)
• http://www.pro-football-reference.com - Large online database of NFL data and statistics
• NFL's Economic Model Shows Signs of Strain
• Professional Football Researchers Association - detailed descriptions of why many of the rules named after players were enacted.