Why Are Some Pitchers Able To Avoid Tommy John Surgery Longer?

With what seems like an increase in Tommy John surgeries the past few years, I've had people ask me why it seems that some pitchers are able to avoid the surgery longer into their pitching career. There are a multitude of things that can decrease the risk/odds of tearing the UCL in the pitching arm. I will try to hit on a few of the major ones in this post.