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