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A real-life prize fighter, mustachioed, tough-looking Jack Roper began turning up in films shortly before sound. His busiest period, however, proved to be 1938-1950, where he portrayed various thugs, mugs, and fighters and can be seen in nearly all the Joe Palooka programmers from Monogram. His final screen appearance seems to have been in John Wayne's The Quiet Man (1952), in which he once again played a prize fighter. Roper spent his declining years as a resident of the Motion Picture Country House and Hospital. He died from throat cancer.