Why is football called 'football'?
The 22 Best NFL Touchdown Celebrations of 2018
NFL Nostalgia: Ranking the Best Teams in NFL History, News, Scores, Highlights, Stats, and Rumors
7 Unforgettable Thanksgiving Day NFL Games
NFL Turkey Leg Award, explained: How John Madden started a Thanksgiving tradition
NFL Explained: Evolution of Thanksgiving Games
Early history of American football - Wikipedia
NFL Thanksgiving Games: History, traditions and best moments - ESPN
Celebrating a century of the NFL in 100 ways - Newsday
John Madden, Hall of Fame Coach and Broadcaster, Is Dead at 85 - The New York Times
NFL history: 100 people who shaped the league, pro football - Sports Illustrated