Tempo. I think you have very fast tempo--which results in faster whip of the arm. I'd like to see you keep up that tempo... consistently. You also look like you keep the forward momentum going to the target well... It's just something that I don't see a lot recently. Too many pitchers are slow and controlled
I'm not sure if I like your arm action. You look like you are just slinging the arm back without much horizontal abduction (aka scap loading). Are you also taught that 'arms are along for ride'? Just curious. Your arm action looks like Denny Neagle's... fyi, he was stuck at 86~88mph and is not a good model for throwing the baseball. His career was saved and famed by his ability to get the batters out, but what could've happened if he could throw at mid-90's?
For arm action, I think you can 'pick up the ball with elbow' and focus on 'throwing with elbow' for enhancing whipping action. Again, some will argue that it'll increase the likelyhood of injury (which, I admit that they DO have a point), but for the sake of maximum capability of throwing, I suggest it. Like Kazmir below...
And try to finish your pitch in very quick fashion--not muscling, but think of quick arm. I've seen David Price pitching and his ultra-quickness on his ball release REALLY makes it difficult for batters to hit it
Just my two cents. [/img]