What happened: His family announced his death Sunday in a statement.
Why it matters: Nelson's career spanned playing, coaching and front-office roles. His fast-paced, small-ball approach influenced generations of NBA teams.
By the numbers: Nelson won three Coach of the Year awards, earned five championships as a player and entered the Hall of Fame in 2012.
What to watch: A celebration of life is scheduled for Aug. 13 in Dallas.