"Coach had them left weights immediately following a game a week ago."
Any coach who makes a 14 yr old to lift weights after a game is suspect. (True, pro players will lift after a bull pen (as opposed to before); but, they are full grown.) Any coach who makes an entire HS team lift after a game had better ensure that his 20+ players have the proper supervision - tired players are prone to shortcuts on form; bad lifting form is asking for trouble.
Sounds like a punishment. Does the varsity lift after every game?
PS. With pregame, game, after game clean up, plus lifting, the time commitment for a single game approaches 4 - 5 hours. Way too long. How does a kid get his school work in?