Heinsohn retired in 1965 and the number 15 holder was retired by the Celtics that year. He finished his career with 12,194 points and 5,749 rebounds.

“This is a huge loss,” the Celtics owners said in a statement. “Tommy was the best Celtic team. For the past eighteen years, our royal group relied heavily on Tommy’s advice and insights and enjoyed his hundreds of stories about Red Auerbach, Bill Russell and how the Celtics became a breed. It’s remembered forever.”

In 1969, Heinsohn was appointed head coach of the Celtics and held the position until 1978. He won the Coach of the Year award in 1973, and under his leadership, the Celtics added two additional banners to the tournament in 1974 and 1976. His career with a record number of 427 -263, which trails Red Auerbach only for most wins in the franchise’s history.

“Without Tommy, the Celtics wouldn’t be the same without Tommy, and he will be sorely missed by those who share his enthusiasm for basketball,” NBA Commissioner Adam Silver said in a statement. “We extend our deepest condolences to Tommy’s family, friends and the Celtics.”

Heinsohn became the color broadcast commentator for Celtics in 1981, partnering with Mike Gorman to form a partnership that lasted several decades.

Heinsohn was inducted into the Naismith Memorial Basketball Hall of Fame as a player in 1986 and as a coach in 2015. He is one of only four people inducted into the Hall of Fame as a player and coach, joining Bill Sharman, John Wooden, and Lenny Wilkins on that list.

“Despite all his accomplishments as a player, coach and broadcaster, it was Tommy’s wealthy personality that defined the man,” the team said in a statement.

“Father, grandfather, and loving husband. Talented painter and energetic golf partner. Informal mentor for decades of Celtics coaches and players. Frequent construction critic of referees. Creator of the most” Celtic statue “of them all, The Tommy Point. And boundless love for all things in Boston Celtics, a passion he shared with his fans for 64 years. “