Jack Wells Davis was an American track and field hurdler, silver medalist in the 1952 and 1956 Olympics over 110-meter hurdles. Davis lost to Harrison Dillard in 1952 with the same time as the winner, and lost to Lee Calhoun in 1956, again with the same time as the winner. He set a new world record 13.4 in a heat at the AAU in 1956.

The 110 metres hurdles, or 110-metre hurdles, is a hurdling track and field event for men. It is included in the athletics programme at the Summer Olympic Games. The female counterpart is the 100 metres hurdles. As part of a racing event, ten hurdles of 42 inches (106.7 cm) in height are evenly spaced along a straight course of 110 metres. They are positioned so that they will fall over if bumped into by the runner. Fallen hurdles do not carry a fixed time penalty for the runners, but they have a significant pull-over weight which slows down the run. Like the 100 metres sprint, the 110 metres hurdles begins in the starting blocks.