take a test:
everybody raise your arm straight up by your head, like raising your hand in class. Now, move your hand backwards while keeping your arm straight (without rotating like a girls softball windup would do), and figure out your range of motion. That's as far as the arm is supposed to go in it's socket, without rotation. Now, figure 230 lbs hitting the ground with a ball in the palm, forcing the hand farther back, as well as someone coming on top with force that pushes your body in the ground farther, while your arm is still straight and has gone passed the point of comfort in your socket, so it tears.
That's not injury prone. That's a freak accident and 9 of 10 people would tear their labrum with that fall. Double jointed people or gumby wouldn't. Last surgery was a cleanup and they are doing those often now because even a normal person's shoulder would benefit from removing spurs and scar tissue. Shoulder cleanups with no repair take 20 minutes. Labrum repair will take @ 1-1.5 hours.
later,
rednecks