That's what rehab appearances are for Dr Herp...I've had recontructive surgery on my ACL, the doctor would not clear him to pitch if he didn't think he could, period.
You're so far off base mate, you're out...here, use this as a tool, please.
http://www.fangraphs.com/library/getting-started/
http://www.fangraphs.com/library/war/
Exactly I started watching 35 years ago and learned to adapt, can't see why he can't, there's a preface of these stats on this site and blog, it's not that flipping hard.