Each team gets 2 challenges to start the game. If the team uses both challenges and is successful with both, they get a third challenge. If the team uses both challenges and is not successful with both, they do not get a third challenge. Three is the most challenges a team can have in an NFL game.
10000
there are six refs in a NFL football game
There are 11 players allowed on the field for each team in an NFL game.
An NFL team can have up to six captains on the field during a game.
3
5
42
In Soccer are penalties and NFL
There is no 'mercy rule' in the NFL. The game is played to the end regardless of the score. The biggest shutout in NFL history came in the 1940 NFL Championship Game when the Bears defeated the Redskins, 73-0.
6
About 170,000
four losers