Here's Lincoln Hamilton of Project Prospect on Stephen Strasburg on Oct. 13, 2009.

"As his hips and shoulders fully open, Strasburg's pitching arm goes through severe reverse forearm bounce (where the ball and the pitching elbow, basically go in opposite directions. In Strasburg's case the ball goes from towards third base to first and his elbow goes from towards first to third). Reverse forearm bounce is a major risk factor for elbow injuries including UCL tears which require Tommy John surgery to fix."

Very interesting. Here's a link if you want to check out the full article:  Here is the full article