[Mr Rogers]

Not seeing many signs of physical fitness here. I also don't see 300 lbs...he isn't THAT fat, and 300 lbs at 6'1" is VERY fat or VERY muscular. But no, no one in their right mind would allow him to play in a league where most kids are under 135...

[Tax-chick]

In that seated position, he could be hiding a really, really large belly, and with the loose shorts, you’re not seeing the size of his thighs or rear.

I have a son who is over 6’1” and weighs around 240. When he’s standing, you can see that he’s overweight, and if he’s in his bathing suit, well ...

My son is almost 16. For a boy so tall and heavy at age 12, an endocrine workup might be a good idea.