American football rules - Wikipedia
NFL Football Operations on X: 2023 @NFL club rules change
NFL rule changes: Kickoffs, instant replay, fourth-down reviews
NFL has votes to make personal fouls eligible for instant replay
NFL owners approve replay change, other new rules for 2021 season
NFL overtime rules 2022: Explaining how the OT format works in
NFL replay rules could reportedly change dramatically in 2021
NFL rule changes 2023: No. 0 jersey is back, personal foul
NFL Rule Change: Officials Now Able To Replay Failed Fourth Down