Bob Kloppenburg
Bob Kloppenburg was an American professional basketball coach, who served as an interim head coach of the Cleveland Cavaliers in the early 1980s. Kloppenburg later served as an assistant coach for the Seattle SuperSonics. Widely regarded as the innovator of the SOS Defensive System, a system known for its ability to create turnovers because of "contact switching" on every screen and intense ball pressure with trapping principles. Also the co-founder, with Coach Ernie Woods, of HoopTactics.com, a basketball coaching website. Kloppenburg played college ball at the University of Southern California with the famous proponent of the modern Triangle offense, Tex Winter.