It would be incredible to tell you that the most successful coach in the NBA is not a player. But it is true that Spurs dynasty godfather Popovich is a coach and not a player. But this does not affect his great achievements in the NBA at all. Father Bobo spent his youth in a military school, but his later days as an assistant in the Air Force School laid a good foundation for him. The Spurs are like an army with strict discipline and strong execution. ?