Coby White's biggest rookie duty? Closing games alongside Zach LaVine Posted Dec 2, 2019 Chicago Bulls coach Jim Boylen has been consistent with his approach regarding Coby White’s closing role. If he has it rolling, which he did in road victories at the Grizzlies and Hornets or the home win over the Knicks, White plays the majority or all of the fourth quarter alongside Zach LaVine. "I think he’s a big moment guy, I think he has that in him." (NBC Sports)