During the 1970s and 1980s, Pruett guest starred on numerous television series including Wonder Woman, The New Leave It to Beaver, It's Your Move, Eye to Eye, The Best Times, Hotel and Night Court. In the late 1980s and early 1990s, he danced in several music videos including two for pop singer Martika: "More Than You Know" (1989) and "Coloured Kisses" (1992). In 1990, Pruett landed his first co-starring television role on the NBC musical teen drama Hull High. Due to low ratings, the series was canceled in October 1990 after nine episodes. Later that year, he was cast as "Steve Randle" in the television adaptation of the 1967 S. E. Hinton novel The Outsiders that aired on Fox. That series was also canceled after one season due to low ratings. From 1992 to 1993, Pruett had a recurring role as "Brad Penny" on the teen sitcom Parker Lewis Can't Lose. In 1995, he co-starred on another short lived Fox series, Medicine Ball. His last television appearance was in a recurring role on the Fox teen drama series Party of Five, in 1996. Pruett's final film appearance was in the independent drama The Right Way (1998), starring Geoff Pierson.