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