Don 'Red' Barry
Mike O'Hara, "King Cobra"
Sheila Ryan
Janet 'J.L.' Brannigan
Joseph Crehan
Oscar Brannigan
Tony Canzoneri
Swinger Markham
William Edmunds
Professor Berger
Lyle Talbot
Radio Announcer
James J. Casino
Boxer (uncredited)
Ned Roberts
Fighter (uncredited)
Jack Perry
Trainer (uncredited)
John Breen
Fight Spectoator (uncredited)
Noble 'Kid' Chissell
Fight Spectator (uncredited)
Bobby Henshaw
Fight Spectator (uncredited)
Charles Morton
Fight Spectator (uncredited)
Sol Murgi
Fight Spectator (uncredited)
Stanley Price
Fight Spectator (uncredited)
Harvey Parry
Bit Role (uncredited)
Al Bain
Fight Spectator (uncredited)
