I think it could be a combo of the 2, I fdon't think the Bills staff think he can handle the workload otherwise why would they take him out? I mean he came out in a crucial time in that playoff game with the Chiefs, I'm not sure if he was injured or not but if not that was pretty telling to me. Also he's not a good blocker at all which would explain alot, knowing the Chiefs were probably bringing the heat probably played a big factor in the decision.