Mike O'Hara, "King Cobra"
Janet 'J.L.' Brannigan
Joe O'Hara
Oscar Brannigan
Tiger Johnson
Swinger Markham
Duke Hensel
Professor Berger
Mama Berger
Joy White
Fight Manager
Radio Announcer
Bettor
Doctor
Referee
Fight Announcer
Boxer (uncredited)
Fighter (uncredited)
Fight Second
Timid Man
Trainer (uncredited)
Fight Spectoator (uncredited)
Fight Spectator (uncredited)
Fight Spectator (uncredited)
Fight Spectator (uncredited)
Fight Spectator (uncredited)
Fight Spectator (uncredited)
Gangster
Bit Role (uncredited)
Fight Spectator (uncredited)