I dont know why I would draft him in any mixed league. Maybe as a deep bench SP for spot starts - maybe.
Both his ERA and WHIP will hurt you - why should I think he should have a sub 4 ERA, and do you know what kind of destruction 180+ innings of a +1.6 Whip does to your average?
His K rate is way below avg for fantasy pitchers too.
As for Ws, I see no reason to expect more than 14-15 at his best.
The park effect and change of league is not going to account for such a drastic drop in %s that his ERA lowers by a full point.
He rates right up there with the most overrated fantasy SPs in the game.