Day At The Races, A (1937) - I Told You To Throw That Race!

Harpo Marx is introduced as mute jockey Stuffy, who recklessly wins a race he was supposed to throw, pursued by crooked banker Morgan (Douglas Dumbrille), aided by his horse owner pal (Allan Jones) and then race track hustler Tony (brother Chico), early in A Day At The Races, 1937.