Tendinitis: need help

I play travel ball and practice every month of the year. Yes sometimes I pitch multiple times in a weekend. I throw a curve but no slider. Actually I have been taught to show the ball to centerfield, but once I visited your website, I changed my mind on that subject. My ball generally moves to the arm side. Im not completely sure what I do during the arm swing, but by mimmicking my arm swing a couple of times, keeping my fingers on top of the ball feels pretty awkward so I dont believe I do that.

This is most likely your problem.

Good.

So do u just think it is overuse problems, no mechanical?

Yes.