Gordon Clark Richardson (born July 19, 1939) is an American former professional baseball player, a left-handed pitcher who played in the major leagues from 1964–66 for the St. Louis Cardinals and New York Mets. He stood 6 feet (1.8 m) tall and weighed 185 pounds (84 kg) as an active player. Richardson appeared in 19 games for the 1964 Cardinals, 13 in relief, fashioning a 4–2 record and a 2.30 earned run average in 47 innings pitched. However, he was not effective in the 1964 World Series, giving up three earned runs in two-thirds of an inning over two appearances.