Whisenhunt is only doing this because he wants to push Leinart. He doesn't want Matt getting too comfortable in the #2 spot, so he made the position up for grabs, just to see how Matt responds to a challenge. I'm sure Whiz already knows Pierre won't beat out Leinart, but a little competition never hurt anyone, and right now, Leinart needs to push himself to be the best player he can, because chances are Warner won't start every game next season (knock on wood). If the running game can be somewhat productive, and Leinart doesnt have to throw the ball 40+ times a game, he should be an above average QB, and prove why he was drafted 10th overall.