no wait, you're serious? Do you really think your putting on 50 pounds since HS is relevant here? Of course people can put on that sort of weight on but players are generally trying to stay slim not bulk up. Weight takes away from speed and endurance and of course causes more pounding on the joints. 274 is way way over what guys his height generally carry... and by guys I mean professional basketball players.
I got a wild hair and researched this a while back. It's pretty uncommon for men to grow much height wise past 18... I can't recall the precise percentage but its rare. So I'm not saying it's impossible he grew taller but rather that it's improbable he did. Google is right at your fingertips if you're really interested or want to try to prove me wrong here.
STOMP