About Jock Mahoney
Jacques Joseph O'Mahoney, known professionally as Jock Mahoney, was an American actor and stuntman. He starred in two action/adventure television series, The Range Rider and Yancy Derringer. He played Tarzan in two feature films and was associated in various capacities with several other Tarzan productions. He was credited variously as Jacques O'Mahoney, Jock O'Mahoney, Jack Mahoney, and finally Jock Mahoney. The first film was completed but never released; Columbia abandoned the series in June 1952, bringing an end to its long history of B-Western production. Mahoney's daring stunts made it seem that the older Starrett grew, the more athletic he became.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.