K. C. Jones
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 in a career, and is one of three NBA players with an 8–0 record in NBA Finals series. He is the only African-American coach other than Bill Russell to have won multiple NBA championships. Jones was inducted into the Naismith Memorial Basketball Hall of Fame in 1989.
Source: Wikipedia