My 9 1/2 year old just started pitch this fall. He has a good arm and throws the ball very well. What concerns me is he throws with a spin. It's not a curve but there is some side spin. He uses 3 fingers instead of 2 because of hand size. I've tried all sorts of drills but it hasn't worked yet. Maybe when his hand gets bigger or maybe it's not a big deal for now. I've always heard lefties throw differently but I wanted to correct something early if I can.