Even though (on paper) Sully should probably be starting when compared to Bass, I can think of a few reasons to keep him on the bench. One, I'm loving the chemistry of the bench unit right now and I'd rather not try to fix a good thing. Two, Bass's performance is highly dependent on his confidence, and he performs better as a starter. Third, Sully is a rookie, so I'd still like to see if he can keep up this level of play, since we don't have too large a sample size of his numbers so far. Also, because he's a rookie, he probably expects to come off the bench, so his confidence/ego won't be as affected as much as a vet's would (see Allen, Ray) if he continued to come off the bench. He'll likely continue to feel like he has something to prove, whereas if he were a starter, he might start to get too comfortable.