Reparto
Tom Brown
Joe O'Hara
John Cason
Tiger Johnson
Margia Dean
Joy White
Michael Vallon
Bettor
Sam Flint
Doctor
William Edmunds
Professor Berger
Noble 'Kid' Chissell
Fight Spectator (uncredited)
Harvey Parry
Bit Role (uncredited)
Chester Clute
Timid Man
Sol Murgi
Fight Spectator (uncredited)
Lyle Talbot
Radio Announcer
Jack Perry
Trainer (uncredited)
Joseph Crehan
Oscar Brannigan
Stanley Price
Fight Spectator (uncredited)
Al Bain
Fight Spectator (uncredited)
Don 'Red' Barry
Mike O'Hara, "King Cobra"
Sheila Ryan
Janet 'J.L.' Brannigan
Charles Morton
Fight Spectator (uncredited)