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