Might have something to do with him being more straight up at the plate and not so hunched over. Go back and look at his AB's from 2011, he was much more straight up and drove the ball to all fields, starting to show signs of doing that again
To be fair he was scratched from his start on Saturday due to illness and apparently he isn't over it yet, still looked sick. Not sure how much that played into it but he did have an ERA under 3 this month prior to this start
He's had a few starts in his career that make you say wow. He needs to be a starter going forward, hopefully he cuts the walks down.
It isn't a question of stuff