Jack Keller, American hurdler (d. 1978)
John Alton Claude Keller (October 23, 1911 – June 3, 1978) was an American hurdler who set world records in both 120 yard/110 meter and 220 yard events. He won the 110 m hurdles at the 1932 United States Olympic Trials, but narrowly missed out on a medal at the Olympics, placing a close fourth.