Don Nelson, 2nd-winningest NBA coach who won 5 titles as Celtics player, dead at 86

Don Nelson, the second-winningest coach in NBA history who won five championships as a player with the Boston Celtics, died Sunday. He was 86.

Nelson's family confirmed the death in a statement that did not how say where he died or provide a cause.

"On Sunday morning our beloved husband, dad, grandfather and great-grandfather Don Nelson peacefully went to be with the Lord, surrounded by his loving family," the statement said. "Throughout his last week, friends and family encircled him with love, sharing the blessing of his friendship and revisiting treasured memories."

Nelson is one of two coaches in NBA history to have at least 250 wins with three different franchises — Milwaukee, Dallas and Golden State — also serving as general manager for all three franchises. He was a three-time coach of the year and made the playoffs 18 times in 31 seasons. He went to the conference finals three times with the Bucks and once with the Mavericks, never winning a title.

Nelson introduced what is now known as the point forward, and his up-tempo style of offence created a buzz. He said the idea of shifting from the dominant big men of the 1970s to an offence focused on speed and the fast break came from his playing days under Celtics Hall of Fame coach Red Auerbach.

"The league really hadn't seen an offence like the one we were running, and the results were undeniable," Nelson wrote in 2016 in The Players' Tribune.

Nelson said that "without Red Auerbach teaching me the mechanics of running the fast break, none of it would have been possible. He deserves all the credit for Nellie Ball, and for how fast the game of basketball is played today."

Nelson played 11 of his 14 seasons in Boston and was on five Celtics championship teams under