Agree! I had when i was 16.....the worse 5-6 weeks of my life. Never felt so drained or tired before. I was forced to sit out my entire football season because of it too.
Every mono case is different ....some people get it a lot worse than others. If he is a more severe case, I wouldnt be surprised if we didn't get him back until around week 6 or 7......He may feel better in a month but I believe the spleen stays enlarged for a bit longer. The doctors probably wont want to risk a ruptured spleen from him being hit.
Tough break for the kid.