Tom Gries Director Muhammad Ali Self Ernest Borgnine Angelo Dundee Actor John Marley Dr. Ferdie Pacheco Actor Robert Duvall Bill McDonald Actor James Earl Jones Malcolm X Actor Roger E. Mosley Sonny Liston Actor Ben Johnson Hollis Actor Paul Winfield Lawyer Actor Lloyd Haynes Herbert Muhammad Actor Dina Merrill Velvet Green Actor David Clennon Captain Actor John Marshall Producer Ring Lardner Jr. Screenwriter Michael Masser Original Music Harry Stradling Jr. Cinematographer Byron "Buzz" Brandt Film Editing Beverly McDermott Casting Robert S. Smith Production Design Solomon Brewer Set Decoration