2
2
a lot
As many as the players can hit. There is no limit.
Nine
25
30
5
me mum
Each team manager gets 1 challenge per game. In an all-stars game each manager gets 2 challenges.
60-75
10, nine on defense and 1 hitting.
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.