Hello Paul, I have been playing baseball for about 12 years. Out of those years I have been a pretty sucessful pitcher. But my curveball is not consistant. I need more info on what you're experiencing on the curve. Please write back.
Sidearm pitching can be very harmful to the elbow and shoulder.
It can also be done properly so it doesn't hurt the arm. Sounds like a good discussion. Let me explain the problems of throwing sidearm first. If the body is upright during the pitching motion and the front arm swings out away from the body at release point, the throwing arm will cast out away in the other direction, causing a sidearm throw. What's wrong with this motion is that the arm can't withstand the amount of force transferring through the arm.