Johan Santana - MEH. Elevates the elbow above the pitching shoulder, but doesn't seem to suffer injury. One of the more perplexing ones out there..
I have said elsewhere that I do not like to see the pitching elbow elevated above the shoulder. Santana appears to do that. I say appears because this is obviously very inexact. Here are a few samples:
Now, like I said, I'm not an expert. I'm also certain you could find plenty of images in which Santana is not elevating his elbow over his pitching shoulder. Using images is the most imprecise way of evaluating mechanics (save watching it live, perhaps). Yet, I can't help but wonder if arm injuries follow trends, and if poor pitching mechanics led to Santana's injury. I won't say that there's causality, but it is enough to make me wonder.