S. Abrams,
My high school son sounds much like your son,HS Senior, 18, 5'10 1/2" 195 lbs, Squats 600 max, reps with 450. Benches 275, cleans 275. Sounds like they would stand toe to toe and look at each other like in a mirror.
One of the things he really fought was loss of flexibility. While his lower body looks like a tree trunk, he actually became slower. He now takes yoga 2 times a week with great results, much improved quickness and flexibility.
We attempted to talk him out of going out for Basketball his senior year but to no avail. Young son wanted to increase quickness and sprinting ability. Still scares us watching him going into a crowd and battling for position or ball but I have to admit that he does appear to be gaining quickness and can really jump. (He got called for goal tending in last nights game).
The wrist roller workout that Coach May talks about is one of the best forearm and wrist workouts I know of, he is not kidding about the burn. Oldest son used to do them daily when he was at home. Simple but effective workout. I trie to do them myself but I am no where near as strong as them, it usually gives my boys something to poke fun at me about.
Something about pain, sweat and tears in dads eyes appears to be funny to them.