Officiating crews for the 2021 season – Football Zebras
NFL will open season with replacement officials
Replay Assistance Rule NFL Football Operations
NFL Football Operations (@NFLFootballOps) / X
NFL Referees Use Replay To Rescind Penalty Against Packers On Monday Night Football, Which No One Knew They Could Do : r/nfl
NFL rule changes: Modified instant replay, more positions allowed to wear single-digit jerseys - The Washington Post
NFL promotes Alberto Riveron to head of officiating - Los Angeles Times
NFL Football Operations NFL Football Operations
Officials' Responsibilities & Positions
NFL Football Operations - Did You Know ➡️ There are no coach's challenges in overtime. All instant replay reviews are initiated by the replay official. Read the full NFL overtime rules here
NFL Football Operations NFL Football Operations
NFL Officials: Preparing for Success
Replay review in gridiron football - Wikipedia