Don Nelson, Five-Time Celtics Champion and NBA Coaching Legend, Dies at 86

Basketball Hall of Famer Don Nelson, one of the most influential coaches in NBA history and a five-time champion as a player with the Boston Celtics, has died at the age of 86.

Nelson’s family announced his death on Sunday, August 9, saying he passed away peacefully surrounded by his loved ones. The family did not disclose a cause of death.

His death brings to an end a basketball career that spanned more than four decades and saw him leave an imprint on the NBA both as a player and coach.

Nelson spent 14 seasons as an NBA player, including 11 with the Boston Celtics, where he established himself as an important member of one of the league’s greatest dynasties.

He won five NBA championships with Boston; in 1966, 1968, 1969, 1974 and 1976.

Although Nelson was not generally regarded as one of the Celtics’ biggest stars, he became a valuable sixth-man presence and was known for his toughness, intelligence and ability to make important plays.

One of his most memorable moments came during Game 7 of the 1969 NBA Finals against the Los Angeles Lakers. With Boston clinging to a one-point lead late in the game, Nelson hit a long jumper that bounced high off the rim before dropping through the basket, helping the Celtics secure another championship.

The Celtics retired his No. 19 jersey in 1978.

After retiring as a player in 1976, Nelson immediately moved into coaching, beginning his head-coaching career with the Milwaukee Bucks.

Over the next 31 years, he coached the Milwaukee Bucks, Golden State Warriors, New York Knicks and Dallas Mavericks, before ending his coaching career with a second stint at Golden State in 2010.

Nelson accumulated 1,335 regular-season victories, leaving him second on the NBA’s all-time coaching wins list behind Gregg Popovich. He was also named NBA Coach of the Year three times; in 1983, 1985 and 1992.

Despite his extraordinary coaching record, Nelson never won an NBA championship as a head coach.

Nelson became particularly famous for his willingness to challenge conventional basketball thinking.

His unconventional approach, popularly known as “Nellie Ball,” emphasised speed, spacing, versatile players and smaller lineups rather than relying heavily on traditional centres.

His philosophy became particularly visible during his years with the Warriors and helped influence the evolution of modern NBA basketball.

Nelson’s coaching career also intersected with several future stars.

At Dallas, he played a major role in the development of Dirk Nowitzki, while at Golden State he coached a young Stephen Curry and helped create an environment in which Curry could develop into one of the league’s greatest players.

One of the defining moments of Nelson’s coaching career came in the 2007 playoffs.

The Warriors entered the postseason as an eighth seed and faced the Dallas Mavericks, who had finished the regular season with the NBA’s best record and were led by Nowitzki.

Nelson’s Golden State team stunned Dallas, winning the first-round series in six games.

The upset became one of the most memorable moments in NBA playoff history and helped cement the Warriors’ “We Believe” era as a defining chapter in the franchise’s history.

Nelson’s contributions to basketball were recognised with his induction into the Naismith Memorial Basketball Hall of Fame in 2012.

He was also selected among the NBA’s greatest coaches and received the Chuck Daly Lifetime Achievement Award in 2025, recognising his lasting contribution to the sport.

The Golden State Warriors paid tribute to Nelson following news of his death, describing him as an innovative figure who saw basketball differently and was unafraid to challenge conventional thinking.

His legacy extends beyond his 1,335 victories and five championships as a player. Nelson helped shape generations of players and coaches and was an early advocate of concepts that have become central to today’s faster, more positionless NBA.

Don Nelson leaves the game as one of the rare figures who made a lasting impact from both sides of the sideline, first as a five-time champion player, and later as one of basketball’s most creative coaches.