Don Nelson, a Basketball Hall of Fame player and coach, has died at the age of 86, his family announced. He was one of the most significant figures in NBA history, spending decades on the court and sidelines and helping shape the modern game during a coaching career that stretched into the 21st century.

Nelson played in the NBA from 1963 to 1976 before moving into coaching, where he held head coaching positions at various points between 1977 and 2010. His family said he died peacefully on a Sunday morning, surrounded by loved ones, with friends and relatives having gathered around him during his final week.