NFL replay rules could reportedly change dramatically in 2021
Minnesota Twins: If more replay helps get calls right, bring it on – Twin Cities
NFL considering 4th and 15 play as onside kicks alternative
NFL rule proposals include adding booth umpire, tech adviser for refs - ESPN
Upon further review, NFL referees under increased scrutiny
Automatic: NFL replay booth playing bigger role
NFL considering adding booth umpire and more to help on replays - Newsday
Really? MLB says replay will speed up pace of games
NFL appears poised to scrap rule that made pass interference reviewable by replay - The Washington Post
Tackling Tech: An Inside Look at NFL Instant Replay for 2017
Which of the Proposed NFL Rule Changes Could Fix What's Wrong With the Game? - The Ringer
MLB umpires may soon take to mic to explain replays – The Denver Post
Minnesota Twins: If more replay helps get calls right, bring it on – Twin Cities
NFL Referee Ron Torbert Makes the Tough Calls
Onside kick review among proposed rule changes