Donald Arvid Nelson is an American former professional basketball player and head coach. Nelson is second all-time in regular season wins of any coach in NBA history, with 1,335. He coached the Milwaukee Bucks, the New York Knicks, the Dallas Mavericks, and the Golden State Warriors. After an All-American career at the University of Iowa, Nelson won five NBA championships playing with the Boston Celtics, with his number 19 retired by the franchise in 1978.

Gregg Charles Popovich is an American professional basketball coach and executive who is the president and head coach for the San Antonio Spurs of the National Basketball Association (NBA). Popovich has been a member of the Spurs organization since 1994, as president of basketball operations and general manager before taking over as coach of the Spurs in 1996. Popovich is the longest tenured active coach in the NBA as well as all other major sports leagues in the United States. Nicknamed "Coach Pop", Popovich has the most wins of any coach in NBA history, and is widely regarded as one of the greatest coaches in NBA history.