NFL players can wear No. 0 under new rule change – NBC Sports Philadelphia
Football Zebras - Analysis and commentary of the NFL's officials and the calls they make
NFL Relaxes Restrictions on Jersey Numbers - The New York Times
NFL Pro Bowl Games 2023: Rules and Format for Skills Challenge, Flag Football, News, Scores, Highlights, Stats, and Rumors
NFL: 9 proposed rule changes for the 2023 season
NFL: Complete list of rule changes for 2023 season
Recap of the actions at the 2023 Spring meetings – Football Zebras
Notes: NFL releases third rule change proposal for 2022 - Pride Of Detroit
American football rules - Wikipedia
NFL Football Operations on X: 2023 @NFL club rules change proposals are in. Check out what was proposed: / X
Thursday Night Football' flex rules, explained: How NFL's potential TNF schedule changes will work in 2023
NFL adopts 9 rule changes for the 2023 season ✭ Inside The Star
With Eye on Concussions, NFL Adopts New Rule on Helmet Hits