CaCo my son is 6'1" and a skinny 150 despite all he eats!
Thank you for all the responses. Our "gene pool" has some tall men on my side of the family...several at 6'3" but not so much on his Dad's side. I appreciate all advice especially for conditioning. We didn't want to push it too soon but now I can see we will probably need something more than what is available at his HS.