- Frank Hagney - Mexican Champ Manuel Quiroga (uncredited)
- Dell Henderson - The Doctor (uncredited)
- Tom McGuire - Los Angeles Promoter (uncredited)
- Bob Perry - Referee (uncredited)
- Lee Phelps - Louie the Bartender (uncredited)
- Andy Shuford - Boy at Racetrack (uncredited)
- Dan Tobey - Ring Announcer (uncredited)
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Maria Ilioú
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