re: Are offensive linemen headed for 400 pounds?

there have been several plus 400 pound HS football players on the radar recently, and none have shown anything like the ability to play D1 ball, due to bad athleticism.

A 400 pound kid that was "healthy" would probably need to be over 7 feet tall, and would still have the question of how well his knee joints could take the strain.

Your assumptions on this topic are way off base, as usual.