What is the process for reviewing and challenging calls on the field in the NFL?

The National Football League (NFL) has a process in place for reviewing and challenging calls made on the field by the referees. This process is designed to ensure that the correct call is made on a play and to prevent incorrect calls from affecting the outcome of the game.

Each team is allowed two challenges per game, and if they are successful, they are awarded a third challenge. Challenges can only be made on specific types of calls, such as a ruling that a player was out of bounds, or that a pass was incomplete. If a coach wishes to challenge a call, they must throw a red flag onto the field before the next play begins.

Once a challenge has been made, the referee will go to a sideline monitor to review the play. They will look at the play from several angles, and if there is clear and obvious evidence that the call on the field was incorrect, they will overturn the call. If there is not enough evidence to overturn the call, the call on the field stands.

It is important to note that not all calls are reviewable or challengeable. For example, penalties are generally not subject to review, and scoring plays are automatically reviewed by the officials in the booth. Additionally, in the last two minutes of each half and during overtime, all reviews are initiated by the officials in the booth and not by coaches.

The NFL has a complex process for reviewing and challenging calls on the field. The following is a general overview of the process:

• A coach can challenge a call on the field if he believes that the call was incorrect. A coach can only challenge one call per half, and he loses a timeout if his challenge is unsuccessful.
• The replay official in the booth reviews the play to determine if there is clear and obvious evidence that the call was incorrect. If there is clear and obvious evidence, the replay official will overturn the call. If there is not clear and obvious evidence, the call on the field will stand.
• The replay official can also initiate a review of a play on his own. This is called a "booth review." The replay official will initiate a booth review if he believes that there is a possibility that the call on the field was incorrect.
• The replay official has 90 seconds to review a play. If the replay official does not make a decision within 90 seconds, the call on the field will stand.
• The final decision on whether to overturn a call rests with the referee on the field. The referee will review the replay with the replay official and make a final decision.

The NFL's replay system has been controversial since its inception. Some people believe that the system is too slow and that it takes away from the excitement of the game. Others believe that the system is necessary to ensure that calls are made correctly. The NFL is constantly evaluating its replay system and making changes to improve it.