Knobby Walsh
Joe Palooka
Anne Howe
Florini
Lefty
Eugene
Ira Eyler
Ronnie Brewster
Mom Palooka
Joe Louis
Smoky
Louie - the Louisiana Lion
Manuel Ortiz (as Manuel Ortiz)
Henry Armstrong
Long-Count Bowman
Rosie Palooka (as Jo Ann Marlow)
Jimmy McLarnin
Stevie Palooka
Al Costa
Herman (Pop) Palooka
Ceferino Garcia
Waldo - the Wyoming Wildcat
Mr. Rodney (as Dave 'Tugwell' Willock)
Radio Announcer
Freddie Wells (as Phil Van Zandt)
Mrs. Stafford
Sammy
Mrs. Van Pragg
Fight Commissioner
Mrs. Oberlander
Curly
Cowboy in Film (archive footage)
Policeman (uncredited)
Headwaiter (uncredited)
Sparring Partner (uncredited)
Newspaper Reporter (uncredited)
Punchy (uncredited)
Patrick Burke - Referee (uncredited)
Fight Spectator (uncredited)
Fight Referee (uncredited)
Aladar (uncredited)
Franki Altri's Handler (uncredited)
Costa Fight Announcer (uncredited)
Timekeeper (uncredited)
John Hansel - Barber (uncredited)
Police Captain (uncredited)
Mr. Enfield - Druggist (uncredited)
Costa Second (uncredited)
Tall Female Ticket Buyer (uncredited)
Mr. Polonski (uncredited)