For the simple reason we could not take any extra chance of Drew getting hurt, so he was limited in the amount of running he could do. IF Scott is a truly capable back up, I think Drew will be allowed to run more if needed. No I don't want him to be a dual threat, but there were many times a first down was there in a crucial situation and he didn't take the opportunity. There is no more humiliating feeling for a defense, than a QB run for a first down at a crucial time in a game.