Early history of American football - Wikipedia
NFL on Christmas by the numbers: Alvin Kamara, Aaron Rodgers headline all-time Christmas performances
NFL Christmas Day: Why to watch Steelers vs. Texans, Raiders vs. Eagles
NFL on Christmas Day: Most memorable games of the last 51 years
History of American Football Facts: From Invention To The Super Bowl
NFL games on Christmas Day 2021: Football schedule, TV info, odds
National Football League on television - Wikipedia
Monday Night Football: How to Watch & Stream Online Without Cable – Billboard
Ranking 12 greatest NFL playoff games of all-time: Chiefs' epic OT win over Bills among best ever
NFL schedule: Football on Christmas Day! Three games for first time
How to watch every NFL and NBA game this Christmas weekend
Football History: NFL Christmas Games – Press Room Pass
NFL's top 10 games in 2023 include Eagles vs. Chiefs, Jets vs. Bills
NFL on Christmas Day: Some of the most memorable games - Los Angeles Times