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