Bernie Casey
Joe Louis
Stephen Macht
Max Schmeling
Allen Garfield
Damon Runyon
Norman Alden
Max Machon
Joseph Campanella
Paul Gallico
Britt Ekland
Amy Ondra Schmeling
Julius Harris
Chappie Jackson
Mordecai Lawner
Joe Jacobs
Denise Nicholas
Marva Trotter Louis
Beah Richards
Lilly Brooks
Percy Rodriguez
John Roxborough
Mel Stewart
Julian Black
Barry Dennen
Adolf Hitler
Johnny Haymer
Nazi Official
Al Lewis
Mike Jacobs
Rod McCary
Rodney
Joshua Shelley
Max
Dan Avey
Blow-by-Blow Announcer
Jack Bernardi
Mr. Weisman
Shaka Cumbuka
Honey Bear
Sarina C. Grant
Vunies
Tom Kelly
First Newsman
Jimmy Lennon Sr.
Ring Announcer
Allan Malamud
Second Newsman
David Moody
Wellwisher
Joni Palmer
Emmarell
Stephen Roberts
Franklin D. Roosevelt
Clement von Franckenstein
German Commentator
Wonderful Smith
Minister
George Latka
Referee Donovan
Pat O'Hara
Tom O'Rourke
Clay Hodges
Warren Munson
Frank Slaten
Nazi #1
Paul Schumacher
Reporter (uncredited)