In what way are you questioning his ability to play 4 next year? It's WHAT he IS. He's a fine center in high school, but he's 6'9" and not Trevion wide bodied. (But a rock hard 240) He has some nice post skills. So did Kenneth Lowe. He wasn't a center either. He can play it, but he can also be more.
LAST year he looked like a center. He was still growing into that BIG body (wait till you see this kid in person) and a bit plodding and mechanical, especially against big time players with quickness.
Well, that's changed in the past year and he now moves much quicker and more gracefully. He's increased his vertical noticeably and dunks with ease from flat footed. He can shoot the jumper just fine (very good free throw shooter) but when you are THE big man on a small team you don't want him out of the paint, so it's not on frequent display. He's got a Big 10 body RIGHT NOW and the feet to play a position of need.
Ya'll gonna like this kid. But not as much as Zack and Tre are gonna.