Sometime in the last two months, something clicked for Zach LaVine. The change has been hard to miss — and it’s exactly what the Chicago Bulls need as they chase one of the last spots in the postseason. In the last 10 games, LaVine’s usage rate has spiked to 30% as he has averaged 30.4 points on 54.1% shooting, including 45.6% behind the 3-point arc.