Following the end of World War II, Mahoney moved to Los Angeles and was a horsebreeder for a short period before moving into movie stuntwork where he doubled for the likes of Gregory Peck, Errol Flynn and John Wayne.
Following the end of World War II, Mahoney moved to Los Angeles and was a horsebreeder for a short period. He then became a movie stuntman, doubling for top stars such as Gregory Peck, Errol Flynn and John Wayne.