FILE: Don Nelson, who won five NBA titles as a player with the Boston Celtics, and went on to be named Coach of the Year three times, has died at the age of 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.