Self, Walter's twin brother and manager
Vincent Cartier
Self
Walter Cartier
Self, boxing historian
Nat Fleischer
Self, Walter's opponent
Bobby James
Self, female fan in crowd (uncredited)
Judy Singer
Self (man at ringside with camera) (uncredited)
Stanley Kubrick
Alexander Singer
Narrator
Douglas Edwards
Producer
Director
Director of Photography
Music
Gerald Fried
Assistant Director
Editor
Julian Bergman
Script
Robert Rein