Robert Louis Hartman (August 28, 1937 – June 16, 2010) was an American professional baseball player. He was a left-handed pitcher who appeared in 11 Major League games over two seasons, pitching in three games for the Milwaukee Braves in 1959 and eight games for the Cleveland Indians in 1962. The native of Kenosha, Wisconsin, stood 5 feet 11 inches (1.80 m) tall and weighed 185 pounds (84 kg). As a Major Leaguer, he allowed 20 hits and ten bases on balls, with 12 strikeouts, in 19 innings pitched.