I think he will be more efficient than some people think. He lost control in his final inning against the Indians in large part, at least it looked like it to me, to the mound. His plant foot kept slipping out from under him because the clay wasn't packed down tight enough. Watching the slo-mo replays of his plant foot slipping was pretty scary. That's a great way to explode your knee. He eventually had the grounds crew come out and fix it.