I'm disappointed in you my young friend.
You can charge him a game fee and just say "they got it right" whenever he comes to you with a question. If they didn't get it right you just say you didn't see the play.
And use your time on the bench productively...like talking up that cute cheerleader you've had your eye on... "yeah, I'm like a consultant to the coach. He needs me here to help him out with the rules. But I'm sure I'm not getting paid as much as you are...what's that? You don't get paid?...oh. Anyway, what are you doing later?"
