There are two opposing arguments on this:
1. The coaches he has have not trained him to get better.
2. He has had new coaches and new schemes almost every year since he has been here.
Honestly, we have seen both issues and neither of them have helped. We have hired and fired coaches over how well this team has played. Cassel has never been that guy that can take the game, place it on his shoulders and carry it home, he has always needed others for that. He is not a good quarterback, but he is the best we have.
So we are stuck now. Honestly, I think the problem with Cassel has been that he has played behind a horrible offensive line for so long that he hears and feels a pass rush even when there isn't one. I think teams have figured out that if they rattle his carge early, that he will give up. It certainly seems the case now.