Knobby Walsh
Leon Errol
Joe Palooka
Joe Kirkwood Jr.
Smoky
Sam McDaniel
Long-Count Bowman
J. Farrell MacDonald
Mrs. Stafford
Betty Blythe
Mrs. Van Pragg
Carol Hughes
Louie, the Louisiana Lion
Eddie Gribbon
Manuel Ortiz
Manuel Ángeles Ortiz
Henry Armstrong
Rosie Palooka
Jo Ann Marlowe
Jimmy McLarnin
Roger Daniel
Anne Howe
Elyse Knox
Al Costa
Lou Nova
Herman (Pop) Palooka
Michael Mark
Ceferino Garcia
Ceferino García
Waldo, the Wyoming Wildcat
Jack Roper
Mr. Rodney
Dave Willock
Radio Announcer
Sam Hayes
Freddie Wells
Philip Van Zandt
Sammy
John Kelly
Fight Commissioner
Emmett Vogan
Mrs. Oberlander
Carole Donne
Florini
Eduardo Ciannelli
Curly
Russ Vincent
Lefty
Joe Sawyer
Eugene
Elisha Cook Jr.
Ira Eyler
Warren Hymer
Ronnie Brewster
Robert Kent
Mom Palooka
Sarah Padden
Himself
Joe Louis
Director
Reginald Le Borg
Screenplay
Cy Endfield
Producer
Hal E. Chester
Comic Book
Ham Fisher
Albert DePina
Associate Producer
George Moskov