The starting quarterback is arguably the most important position in all of professional sports. They can single-handedly determine if teams win or lose games through their own performance and leadership abilities. As a result, they are usually the highest-paid players on their teams and in the NFL as a whole.
Despite the massive importance of a starting quarterback, one could argue that the backup quarterback position is just as important to a team. Entrusted to lead the offense in the event of poor play or injury, the backup quarterback can be the difference between a team staying afloat or having a lost season.