Actually, that one play against New England or Miami (can't remember right now)was supposed to be a pass. You could absolutely tell the way Keller avoided the block and was getting down field.
Either way, does it really matter??? He's not a good thrower of the football, and even if they know it's a run, we still have an advantage with the blocking. If everyone blocks it the way they have to, we have a hat for every hat.