Did you watch the video the competition was pathetic.
e didn't rely on jumping over people to get rebounds. he relied on positioning, boxing out and hustle.
He relied on his backside, and hustle was not part of his game. He has good hands and viewed every rebound as a pass to himself which the great rebounders do.
But the defensive lapses, only being able to play positional defense, and not slide over to help or rim protect is the same problems we have with Grant except Sully can rebound. By positional defense I mean holding his space in the post which we sorely lack but he was poor in every other defensive metric.
here some other NBA guys over there, the g league would be better competition
Shabazz Muhammad Goes off 39 points 14 Rebounds in China (CBA) Shanxi
https://www.youtube.com/watch?v=v9Py1uvNmik