When Roos co-produced The Godfather Part II, he recommended Spradlin to play the role of a corrupt U.S. Senator from Nevada, Senator Pat Geary, and he also played a senator in the 1976 TV miniseries Rich Man, Poor Man Book II. Among his film credits are One on One (1977) (as an authoritarian basketball coach) and Apocalypse Now (as General Corman, the officer who assigns Martin Sheen's character to the search mission). He played the head football coach B.A. Strother in North Dallas Forty (1979), "Carolina Military Institute" commandant General Durrell in the 1983 movie The Lords of Discipline, a conspirator in the attempted assassination of a state governor in Nick of Time, a minister in Ed Wood, and the President of the United States in The Long Kiss Goodnight.