McGee or Carpenter Who’s wins the 3rd QB Spot?

If Tony Romo gets injured this season, the starting job would go to Kyle Orton, no doubt. But what would happen if Orton would be injured as well? You have the choice between the 2009 Fourth-rounder from Texas A&M, Stephen McGee, or you have the 2009 undrafted QB from Arizona State, Rudy Carpenter, who had a stint with Dallas in Early ’09.