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Wallace Beery

Andy 'Champ' Purcell

Jackie Cooper

Dink Purcell

Irene Rich

Linda Carleton

Roscoe Ates

Sponge

Edward Brophy

Tim

Hale Hamilton

Tony Carleton

Jesse Scott

Jonah

Marcia Mae Jones

Mary Lou Carleton

Dannie Mac Grant

Boy Taunting Dink (uncredited)

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)