- Glam
1998 Don Mallon
- Walking Thunder
1995 Gun Trader
- RoboCop 3
1993 Sergeant Reed
- Short Cuts
1993 Knute Willis
- I Don't Buy Kisses Anymore
1992 Fred
- Original Intent
1992 Ben Reid
- Diplomatic Immunity
1991 Ferguson
- RoboCop 2
1990 Sergeant Warren Reed
- Miracle Mile
1989 Fred the Cook
- Mercenary Fighters
1988 Colonel Kyemba
- RoboCop
1987 Sgt. Warren Reed
- Good to Go
1986 Max
- Between the Darkness and the Dawn
1985 Principal
- My Science Project
1985 Desk Sergeant
- Fast Forward
1985 Mr. Hughes
- Dark Mirror
1984 Higgens
- Obsessive Love
1984 Douglas
- Cloak & Dagger
1984 Lt. Fleming
- Andrea's Story: A Hitchhiking Tragedy
1983 Sgt. Corbett
- Making of a Male Model
1983 Policeman
- I'm Dancing as Fast as I Can
1982 Teddy
- Carny
1980 Jerry
- The Harlem Globetrotters Meet Snow White
1980 Marques (voice)
- Guyana: Crime of the Century
1979 Oliver Ross
- The Child Stealer
1979 Houghton
- Green Eyes
1977 Hal
- Roger & Harry: The Mitera Target
1977 Lt. Shelley
- Buffalo Bill and the Indians, or Sitting Bull's History Lesson
1976 The Wrangler (Oswald Dart)
- Treasure of Matecumbe
1976 Ben
- Almos' a Man
1976 Bob Glover
- Nashville
1975 Wade Cooley
- Walking Tall Part II
1975 Obra Eaker
- Heatwave!
1974 Offical
- Willie Dynamite
1974 Baylor the Pimp (uncredited)
- Coffy
1973 King George
- A Dream for Christmas
1973 George Briggs (as Robert Do Qui)
- Visions...
1972 Andrews
- The Man
1972 Webson
- Lieutenant Schuster's Wife
1972 Det. McCann
- The Red, White, and Black
1970 Eli Brown
- Tarzan's Deadly Silence
1970 Metusa
- The Devil's Eight
1969 Henry Reed
- Uptight
1968 Street Speaker
- Doctor, You've Got to Be Kidding!
1967 Orderly
- The Fortune Cookie
1966 Man in Bar (as Bob Doqui)
- Clarence, the Cross-Eyed Lion
1965 Unteroffizier
- The Cincinnati Kid
1965 Philly (uncredited)
