Gettlemen has usually rolled with only two to my knowledge.
Correct me if I'm wrong, but the Panthers have always carried 3 QBs on their roster and Gettleman did so in New York as well. In this day and age of injuries to QBs, why risk having only 2 available on game day?
We have only had two available on game day since drafting cam. Clausen was not an active player during any of those games and despite what some think he would not be able to play in the game if cam and DA were to go down. So no need really for a third qb. Designate someone as an emergency qb and roll with two on the roster and either one on the practice squad or sign a FA if one gets injured.