 He was an offensive lineman on the football team and was drafted by the Buffalo Bills in the 1975 NFL Draft.Dienhart coached football and track at St. Thomas from 1981 to 1986 and led the Tommies to the 1985 Division III Indoor National Championship.Dienhart served as the Minnesota Golden Gophers men's athletics director from 1995 until 2000, when his contract was not renewed following the academic scandal in the men's basketball program under head coach Clem Haskins.