K. C. Jones – Wikipedia

K. C. Jones (May 25, 1932 – December 25, 2020) was an American professional basketball player and coach. He is best known for his association with the Boston Celtics of the National Basketball Association (NBA), with whom he won 11 of his 12 NBA championships (eight as a player, one as an assistant coach, and two as a head coach). As a player, he is tied for third for most NBA championships …

https://en.wikipedia.org/wiki/K._C._Jones