i'd definitely want him starting the game instead of entering and having to clean up somebody's mess...it's a waste if he has pitch in the 5th inning of a blowout.
one idea is to put his autorest at 99, pull at 1, 50/60 PC and stick him on setup A. he'll probably be good for 3 IP once every 3-4 games...he only gets 140ish IP instead of his current 160, but he'll mostly be used in higher leverage situations.
not that i would definitely do that over starting him, but i'd give it consideration.