There’s a popular saying among football coaches and analysts that if you have two quarterbacks, you have none.
There is some merit to that theory. The quarterback is looked to as the undisputed leader of the entire team. When things go poorly, everybody else on the team looks to him for leadership and direction. If you rotate quarterbacks, you often don’t have that one undisputed leader.
From a physical standpoint, why would you take out one quarterback if the offense is clicking just fine with him at the helm?
Then there’s Dan Mullen. The fourth-year Florida head coach has become famous in part for his ability to seamlessly mesh two quarterbacks into his game plans.