K. C. Jones

K. C. Jones (May 25, 1932 – December 25, 2020) was an American basketball player and coach. He is best known for his career with the Boston Celtics of the National Basketball Association (NBA). 
He is the only African-American non-player head coach to win multiple NBA championships. Jones was added into the Naismith Memorial Basketball Hall of Fame in 1989.
Jones died on December 25, 2020 at an assisted living center from Alzheimer's disease-related problems in Connecticut, aged 88.