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