I have no idea if the player in the post throws enough or not...but at age 12 I can only assume that he is either not conditioned or not doing it right to be sore and needing ice.
As for my rubber comment, I was referring to all youth in general. Their bodies bounce back far quicker when they are young, and things that would land an adult in the hospital for weeks they just pop up and say "I'm okay!" Of course children can get broken arms and they can get hurt, but having multiple 12 year old's on one team asking for ice because their arm hurts/is sore...doesn't sound normal to me.
I am not sure how one can assume anything without knowing the player but this is why I posted about injuries. Parents do your due diligence when you have control over the situation. I agree NO 12 year old should be experiencing any type of pain in any sport, but they do, because parents just cant have them not be in the game, because they are afraid they will miss out on something.
My daughters BF son age 12, had bad knee issues and not able to do anything for 2 months. Dad just thought playing football and lax at the same time was a good thing. It was 5 -6 days a week of either games or practice. Because he has growth issues to begin with, he ended up with a serious issue.
Not agreeing that all kids bounce back from injuries. Lots of it depends on growth issues, those injuries showing up later many times are from youth issues never properly addressed.