I agree he can put on more muscle. I was referring more to him continuing to play football. His body type and speed (or lack thereof, 4.9 in middle school or freshman football is really probably a 5.4 or more, when you put on the vest and run on the laser) lends him to pretty much playing only o-line or d-line. Both positions, at the college level and beyond, have gotten to the point where you are undersized if you're not at least 6'4". If he already weighs 285 at 14, he can probably certainly put on another 40 but that will decrease he speed even more. He could probably play at a D2 or D3 school but unless he grows another 3-5" in height, HS or D2 will be the end of his football carrier. With his body type, he needs to get into powerlifting.

And if he goes the powerlifting route, he's eventually going to have to say hello to a squat rack, sometime in the future. LOL