O.A. "Bum" Phillips, the former Houston Oilers (1975-80) and New Orleans Saints (1981-85) head coach, was the first to use the 3-4 set on every down in 1975. In 11 seasons as a head coach, Phillips' defenses ranked in the league's top half nine times. When he became the Saints' head coach in 1981, Phillips inherited the league's worst defense (No. 28 overall) and built it into an NFL top-five unit in three of the next five seasons.