Official Site of the National Football League
Approved 2023 NFL Rule Changes
2023 NFL Rule Changes - October 7, 2023
New NFL rules for 2023: league adopts changes to replay, fourth-downs
2023 NFL Schedule Release - NFL Network
XFL Announces Key Rule Changes for 2023 Season, Kick Off, Tiered Extra Points Remain
Opinion The N.F.L.'s New Kickoff Rule Is Terrible - The New York Times
NASCAR rule changes; no road course stage breaks and more
2023 NFL Schedule Release - NFL Network
NFL rule changes 2023: No. 0 jersey is back, personal foul penalties clarified, one date for roster cutdowns
New NFL rules for 2023: league adopts changes to replay, fourth-downs
American football - Wikipedia