Even if you go by his xFIP (4.16) this year, he has around the same xFIP as Buerhle (4.21), CJ Wilson (4.10), Matt Harrison (4.10), and Kyle Lohse (4.16).
If you want to label that a '#5 starter,' that's fine, but whatever he gets labelled, he's been very good this year.
Exactly.... we have three #1 starters, two #3 starters, and a #5 starter in AAA. A lot better than the years when we had five #5 starters.