Alright so I've had the same injury for the last couple seasons. It occurs in the inner bicep after lots of throwing and throbs in pain often times.
I'm a 17yr old right handed pitcher with a curve, change, and 4seam fb. I believe I'm fairly solid mechanically and this injury is puzzling and very limiting on my baseball ability. I'm pretty sure its not the curve ball causing the problem because I haven't throw many of them a this season yet.
Basically I'd like to know what type of mechanical flaws would cause this injury and what changes can be made. Also if there is any exercises or stretches to prevent this injury in the future I'd like to know them. Any helpful responses would be very appreciated.
Below: a picture of the area where i feel pain(not my arm)