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