cast
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Bud Abbott
Bud Alexander
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Lou Costello
Lou Francis
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Nancy Guild
Helen Gray
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Arthur Franz
Tommy Nelson
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Adele Jergens
Boots Marsden
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Sheldon Leonard
Boots Morgan
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William Frawley
Det. Roberts
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Gavin Muir
Dr. Philip Gray
- Sam Balter Radio Announcer
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John Daheim
Rocky Hanlon
- Walter F. Appler Professor Dugan (uncredited)
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Bobby Barber
Sneaky (uncredited)
- Howard Banks Officer (uncredited)
- Richard Bartell Bald Man (uncredited)
- Phil Bloom Fight Spectator (uncredited)
- John Breen Trainer (uncredited)
- Milt Bronson Ring Announcer (uncredited)
- Ralph Brooks Man at Bar (uncredited)
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Steve Carruthers
Reporter (uncredited)
- Tom Coleman Dugan Detective School Graduate (uncredited)
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Chester Conklin
Counter Man (uncredited)
- Bing Conley Trainer (uncredited)
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Russ Conway
Newspaperman (uncredited)
- Paul Cristo Fight Spectator (uncredited)
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Frank Dae
Col. Duffie (uncredited)
- Roy Darmour Man (uncredited)
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Sayre Dearing
Reporter (uncredited)
- Jack Deery Hospital Visitor (uncredited)
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Jimmy Dime
Man in Gym (uncredited)
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Ralph Dunn
Motorcycle Cop (uncredited)
- George Ford Reporter (uncredited)
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Edward Gargan
Milt (uncredited)
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Harold Goodwin
Bartender (uncredited)
- Dick Gordon Man (uncredited)
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Kit Guard
Fighter on Rowing Machine (uncredited)
- Bobby Hale Graduation Spectator (uncredited)
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Chuck Hamilton
Policeman (uncredited)
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Stuart Holmes
Fight Spectator (uncredited)
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Kenner G. Kemp
Policeman (uncredited)
- Johnny Kern Trainer (uncredited)
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Donald Kerr
Fight Spectator (uncredited)
- Perc Launders Cop (uncredited)
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George J. Lewis
Torpedo Al (uncredited)
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Rory Mallinson
Tough Guy in Bar (uncredited)
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Paul Maxey
Dr. Turner (uncredited)
- Mathew McCue Graduation Spectator (uncredited)
- Hans Moebus Restaurant Patron (uncredited)
- Ralph Montgomery Photographer (uncredited)
- Mike Morelli Training Spectator (uncredited)
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William H. O'Brien
Fight Spectator (uncredited)
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Monty O'Grady
Fight Spectator (uncredited)
- Franklin Parker Photographer (uncredited)
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Jack Perrin
Dugan Detective School Graduate (uncredited)
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Jack Perry
Rocky's Handler (uncredited)
- Victor Romito Waiter (uncredited)
- Clark Ross Fight Spectator (uncredited)
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Syd Saylor
Waiter (uncredited)
- Sammy Shack Fighter (uncredited)
- Edith Sheet Nurse (uncredited)
- Jack Shutta Attendant (uncredited)
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Carl Sklover
Lou's Handler (uncredited)
- Billy Snyder Newspaperman (uncredited)
- Brick Sullivan Dugan Detective School Graduate (uncredited)
- Frankie Van Referee (uncredited)
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Herb Vigran
Stillwell (uncredited)
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Billy Wayne
Rooney - Rocky's Manager (uncredited)