​FILE - AUGUST 09: Don Nelson, the second-winningest coach in NBA history who won five championships as a Boston Celtics player, died on August 9. He was 86. 27 Mar 2000: Head Coach Don Nelson of the Dallas Mavericks yells on the court during the game against the Utah Jazz at the Delta Centerin Salt Laker City, Utah. The Mavericks defeated the Jazz 113-105.