To me, the bigger question is whether he should play at all. At this point, I'd rather play Johnson, Lee, Sully, and Olynyk over Zeller. And that's not even bringing Mickey and Jerbenko into the conversation.
We could go 5 deep, I suppose. However, I don't see why Johnson, Lee, Sully, and Olynyk all can't play 24 mpg if they really are the best 4.