Jack Hatfield Smith (November 15, 1935 – April 7, 2021) was an American professional baseball player. The native of Pikeville, Kentucky, was a right-handed pitcher who worked in 34 Major League Baseball (MLB) games (all in relief) for the Los Angeles Dodgers and Milwaukee Braves between 1962 and 1964. He was listed as 6 feet (1.83 m) tall and 185 pounds (84 kg). But, following a June 21 relief appearance against the Houston Colt .45s, Smith was sent down to Triple-A Denver, and never returned to the majors. He retired after the 1965 campaign.