This is embarrassing for the league office. The NFL admitted their replay review official made a mistake in Kellen Moore's first successful challenge.

When the NFL first reintroduced replay review 26 years ago, it started with a limited range of reviewable plays. Over time, the list of plays that could be corrected by replay review has expanded. Here's what typically happens.

On the Isaiah Likely play, that third step never happened. Steelers cornerback Joey Porter Jr. knocked the ball loose before Likely planted his foot. NFL Officials ruled the pass incomplete and pointed to the missing third step as the deciding factor. They said the third step counts as an act common to the game.

NFL head of instant replay Mark Butterworth explained why two crucial calls during the Ravens-Steelers game were called as such.

ORLANDO, Fla. -- NFL owners voted Tuesday to use a centralized system to help referees in stadiums make decisions on replay reviews. Officially known as Rules Proposal 9, the centralized replay system will feature feeds from every game as well as an ...

The Carolina Panthers ' Week 15 loss to the New Orleans Saints may prove to be a rather costly one. Not only did they have a chance to get their magic number for the NFC South crown down to one, but they had a chance to do it against a three-win team.