A recovery strategy aids performance.
The body heals and transforms training to performance gains.
Prioritizing sleep and nutrition habits will help.
Create a bed time routine. Keep it simple this can include mobility work, avoid blue light from tv, ipad, video games when winding down.

Checkout these Down Regulation Saturday episodes:
Episode 1
Episode 2
Episode 3
Episode 4
A Pro Episode which hits on unilateral athletes some things keep in mind.
Pro Episode # 25 – Matt Hasselbeck Edition: Advice for the Uni-Lateral/One Sided Athlete

A solid warm up is key.
What are you seeing that makes you say all of the players are in desperate of a program?
What did your son experience last season?