Don Nelson, who won five NBA titles as a player for the Celtics before becoming the second winningest coach in NBA history, has died at the age of 86. Nelson is one of two coaches in NBA history to have at least 250 wins with three different franchises. Key points and original sources are listed below.

• Don Nelson, who won five NBA titles as a player for the Celtics before becoming the second winningest coach in NBA history, has died at the age of 86.S1

• Nelson is one of two coaches in NBA history to have at least 250 wins with three different franchises.S2

• Nelson had second-most coaching wins in NBA historyWon five titles with Boston Celtics in 1960s and 70sHelped develop stars Steph Curry and Dirk NowitzkiDon Nelson, the second-winningest coach in NBA history who won five championships as a player with the Bost...S3

• Don Nelson, the second-winningest coach in NBA history, has died at the age of 86.S4