Yabu has such strange physique, "big boned", huge ass. He looks like he could be our next Sully, but he is much more explosive. That, along with him playing Center, which is hard for a rookie, especially defensively as it is the hardest defensive position to play. He could frustrate, but that's nitpicking.
Also, I hate to see when J.Brown dunks/lays the ball and lands awkwardly, off balance, tripping, falling. It makes me think that he will unnecessarily injure his lower extremities on one of these attempts.