Chris Carpenter threw two simulated innings of live batting practice on Friday It was his first time facing live hitters since undergoing surgery in mid-July to alleviate thoracic outlet syndrome. While it was assumed that the surgery would end his season, Carpenter hasn't ruled out the possibility of returning in September. "Like I said all along, I'm not just going to sit around and waste the month," said Carpenter. "If I have a shot, why not push it? Today was that step and it felt good. We'll see what happens tomorrow."