With 84 VR I think he's useful. But he's going to annoy you. He'll walk people when you don't want him to and, because of the low GB, he's going to give up bombs after he walks the guy. And he isn't going to strike anyone out. Personally, even though he can handle a higher workload, I'd put him on a PC of 25/35 and a pull of 4. That way, when he's pitching well, he gets out of the game before he screws it up and he'll be ready again the next day.