This is definitely not proven but my opinion is that a "short armer" would probably have more elbow
problems. And this is just from personal experience from developing a shoulder problem in "A" ball-I was a long and loose "slinger" and after three trips to Jobe and Kerlan(orthopoedic drs. in LA) and
numerous cortisone shots with little relief, I decided to change my delivery to short-arming and had
little pain in the shoulder. My velocity dropped but my control increased(along with wins
) and was
able to pitch a few more years.
Who knows? I know one thing I believe for sure-If the muscle strength is increased around both shoulders it should lessen the chance for injury and prolong the life of a "pitching" arm.