Not to defend my personal position any more, but I just have to wonder about something. ASMI's research has shown that physically, a fastball is harder on the arm than a curveball or a change up. Yet many are still of the firm opinion that curveballs are bad on the arm for anyone until they start to shave on a regular basis or somewhere around there. ASMI also states that the biggest problem with arm injuries is over use related. That includes pitching past the point of fatigue and pitching without enough rest from a previous outing.
OK, could it be that the kids who throw a breaking ball are more effective than those who don't - especially at a young age - and are therefore used more often without the proper rest and are therefore more susceptible to arm injuries?
I know people are going to feel the way they do about this subject and are probably not going to be swayed one way or the other, but I think this is something to think about and consider. What do you guys think?