Casanova led the Ducks to two more bowl appearances, in the Liberty Bowl (1960 vs Penn State) and the Sun Bowl (1963 vs Southern Methodist), before becoming the UO's second full-time athletic director in January 1967, replacing Leo Harris. Future Pro Football Hall of Fame members Mel Renfro and Dave Wilcox were players under his tutelage. Many of his assistant coaches such as George Seifert, John McKay, and John Robinson went on to have their own successful head coaching careers. His career record of 82–73–8 marked the highest number of wins recorded by a head coach at the university at that time. The Len Casanova Center, Oregon's athletic department headquarters near Autzen Stadium, is named in his honor. Casanova's move to the administration began a two-decade downturn in Oregon's fortunes. Longtime offensive line coach Jerry Frei succeeded Casanova as head coach in 1967, the year Oregon moved its home football games to the newly constructed Autzen Stadium. His teams were never selected for a bowl game and never won more than six games in a season. Although he ended his Oregon career with a losing record, he coached several players who went on to NFL stardom, including Hall of Fame member Dan Fouts and All-Pro wide receiver Ahmad Rashād, known by his birth name Bobby Moore during his college career. In 1970, he coached the Ducks to an improbable comeback at UCLA, scoring 20 points in the final four minutes of the game to beat UCLA 41–40. However, Frei was unable to defeat arch-rival Oregon State, and after the 1971 loss some influential boosters reportedly were demanding that he make significant changes to his coaching staff. On January 18, 1972, Frei resigned as head coach, citing disagreements with university boosters and Athletic Director Norv Ritchey. Following his resignation, the student body president at the time, as well as others, numerous published letters to the editor of the Register Guard voiced their support of Frei. After an exhaustive search that included interviews with several established head coaches, Frei's offensive line coach, Dick Enright, was elevated to head coach for the 1972 season. Enright was the least experienced candidate for the position, having been a high school coach until 1970, and he struggled to maintain team discipline and consistent play. Enright famously tried to make an option quarterback out of Dan Fouts, who was not a runner. Although his 1972 team did beat Oregon State for the first time in nine seasons, Enright's teams only won six games in two seasons.