Do what other stuff? Almost all of the successful HC were OC's or DC's before the took a HC position. I think the issue is that an OC can have 1 yr of being an OC and have success and he gets hired as a HC . Brady is a prime example. He had maybe the greatest college offense in history and he was CO OC at LSU and was not the primary play caller for 1 yr and he gets the Car OC job, He bombs there and goes to Buff as QB coach with maybe the best QB in the league. The OC get's fired and Brady gets promoted. He does well but he's got Allen for a QB. Now he's a hot HC prospect.