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.

After a stellar 9–3 record and 1.55 earned run average for the Triple-A Jacksonville Suns, he was recalled by the Cardinals and made his major league debut as a starting pitcher against the first-place Philadelphia Phillies on July 26 at Connie Mack Stadium.

He also recorded his first major league save against the Phillies on September 30 at St. Louis, preserving an 8–5 win for Redbird lefthander Curt Simmons.

[2] Richardson's efforts were crucial, as they enabled the Cardinals to overtake the Phillies to finish in first place in the National League by a single game.

During the 1964 offseason, the Cardinals traded Richardson and outfielder Johnny Lewis to the New York Mets in exchange for Tracy Stallard.