This kid is no lineman, however. They are trying him at RB, TE.... mostly a D'lineman. He's so big he can just run over people EXCEPT... not in him to do that right now. And not quite coordinated enough to make any type of moves when running the ball.
About this age - 12 to 14, most kids make the transition from "football is playtime" to serious aggression. He hasn't done so yet... but it could happen quickly!