NFL Football Operations on X: Here's a look at the 2020 rules change proposals submitted by the clubs: / X
NFL contemplates on-pitch penalties for derogatory slurs
2023 Rules Changes and Points of Clarification
Madden NFL 23 Franchise Mode
Five rule changes the NFL should consider - Sports Illustrated
Conversion (gridiron football) - Wikipedia
NFL approves 2 rule changes; postseason OT altered
American football - Wikipedia
New jersey numbers for players and other rule changes for 2021 - Hogs Haven
AAF introducing sky judge, other rule changes in inaugural season
The Rock's XFL Agrees to Deal with NFL to Innovate Game, Test Rule Changes for Safety, News, Scores, Highlights, Stats, and Rumors
Alliance of American Football 2019 Rules and Format: How They Differ from NFL, News, Scores, Highlights, Stats, and Rumors