I can't recall us having anybody above 6'9" with ability anywhere near KJ. Usually our 5 is a 6'8" with stone hands or zero offensive game, and we sometimes have a 6'10"-7" guy on the bench that plays like his shoelaces are tied together.
Being the only big in the game might hurt him, having to battle in the post by himself every play. One reason, no one to split fouls with if trying to contest the opponents post game.