So - school, practice, lessons, games, girls, etc.? And you're lifting at midnight?
In high school I did track and gained inches on my leg muscles from running and not lifting weights during the track season.
So...How much does he practice? 2 hours 5 days a week? 3 hours 6 days a week? Does the team lift during practice (we did when I ran indoor track). Do they do 100 push ups and 100 sit ups each day? Do they run bleachers? You can't be Superman. You have to make sure that your body can respond to the stimulus given. Sleep and eating are just as important as working out. If lifting adds too much to the pot, then it might boil over! If he made good gains, they won't just dry up if he stays active. Yes, he may lose some strength over the season, but can he lift in addition to all the rest he does? You have to see what can work.
1) squats
2) calf raise
3) DB press or push ups or incline press
4) chin ups
5) side bends one day and sit ups the next
6) wrist curls one day and grip exercise the next
Lift 1,2,or 3 days a week - everybody's different and has different situations. Don't lift the day before a game. Do a warm up set or two and 1 or 2 work sets. If you are looking for a "specific" work out you'll have to get that from someone else. I've lifted for too long to give out a specific program since there are too many variations and you have to see how the person is and their situation to have a clue on what to try. Look for signs of overtraining and back off if needed. Long practices may be all he needs especially if the skill can be improved. I knew a guy at work who benched 300 and hit the ball in a softball game almost to the second baseman swinging as hard as he could( and he couldn't throw that far!). All that strength didn't help him at all. Give more specific information if you want more opinions. Hope this helps.
Tim Robertson