My biggest question is that if we keep Zeller, is he really a legit Center? He's not a rim-protector (nor will he be with his below-average arm length)... Ideally, he could be good post defender if he were to get to that 255-260 weight range to compliment his decent quick feet.
I'm just providing some pessimism due to watching his college play, where he was essentially a stretch 4... along with our plethora of them..