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