Westphal died after a battle with brain cancer, according to USC, where he played from 1969 to 1972. He’s survived by his wife Cindy, two children and grandchildren.
Westphal was drafted by the Boston Celtics as the 10th pick of the 1972 NBA draft, according to USC. He won an NBA title with the Celtics in 1974.
After his playing career, Westphal entered coaching, beginning at several small colleges. His 1988 Grand Canyon College team won the NAIA national championship. He then moved to the NBA as an assistant coach with the Suns.
He spent 10 seasons as a head coach for three different NBA teams, including the Suns — which he coached to the NBA finals in 1993 — the SuperSonics and the Sacramento Kings.
“His toughness, skill and intellect made him a key contributor on the Boston Celtics’ 1974 championship team and a perennial All-Star with the Phoenix Suns,” Silver said.
“He will be remembered for his generosity, leadership and love for the game, which defined his many years in the NBA,” Silver added. “We extend our deepest condolences to Paul’s wife, Cindy, and their family.”
CNN’s Dakin Andone contributed to this report.