Quote Originally Posted by Joebob View Post
I'm not sure you can really improve arm strength. Not sure why, but most quarterbacks ( and pitchers) either have a strong arm or they don't. Maybe it's a factor of your fast twitch muscles (which don't respond well to strengthening attempts). It's probably similar to why you're either fast or you're not.
It can improve but not totally change. Guys go from throwing 92 to throwing 98 all the time. The good thing for Will is that he hasn't hit puberty yet.