Therefore, because of the inability to review certain plays, the wrong call becomes a part of the game that the players have learned to deal with. .
The reason coaches are given challenge flags in games is so that they can challenge a call that, in their opinion, the referees got wrong. But again, coaches are only allowed to challenge certain plays. Now, if they think that their team was wrongly flagged for any reason, they can't challenge the call because you're not allowed to challenge a flag. The NFL has people that let the referees know on scoring plays if there's a questionable call that they should review. If this was done on all plays there would be no need for challenge flags, and there would be less discrepancy in games due to controversy. Below, you will see a picture of two guys trying to catch a football, known as the infamous "Fail Mary" play, where it was called a touchdown even though it was an interception. Now, this is just one example of the referees deciding the game on a wrong call, which is something that still occurs today, but no one play has had more controversy around it in football than this play, in recent years. .
On all scoring plays the referees have the ability to review this play, but even though they reviewed it they still made the wrong call. How does that happen when you review the play, some might ask? Well in the 2012-2013 season, the NFL was using what they called "replacement referees" because the NFL and the NFL Referee Association failed to reach a consensus on a collective bargaining agreement. While it was only three weeks that the replacement referees were used they did a lot of damage. Players from around the league complained how the flow of the game was hindered, and poor call after poor call was made. The job of being a NFL referee is no easy job, and it showed when they missed the first three weeks of that season, which forced the NFL to comply with the referees circumstances of returning.