I just think Preston doesn't have the strength to be anything more than a center. He isn't strong enough to move his man one on one in the running game at guard. I wish they would have kept him at center full-time as well, but he is a backup, and backups need to be able to know multiple positions. As I've stated before, I would of liked to have signed Stephen Neil, but oh well. Fowler isn't very strong either, but he makes up for it with unusual athletic ability for a man his size. Maybe Preston could eventually make a push for his position, but I don't want to see Preston as a starting guard.