Injury
There are many injuries in the game of football. Some players can play with pain and some players do not do as well when trying to play at a high level. The National Football league has put in many rules to try to protect the big time players that make the league a ton of money. The quarterback is the position that the league has focused on the most when it comes to keeping a player from getting injuries and not being able to play in any games for the rest of the season. This is a major part of all kinds of sports or tennis matches.