Gary Alan Kolb (born March 13, 1940) is an American former professional baseball player. An outfielder and utilityman, Kolb played all or parts of seven seasons (1960; 1962-65; 1968-69) of Major League Baseball with the St. Louis Cardinals, Milwaukee Braves, New York Mets and Pittsburgh Pirates. He threw right-handed, batted left-handed, stood 6 ft 0 in (1.83 m) tall and weighed 194 lb (88 kg).
Kolb signed with the Cardinals in 1960 after attending the University of Illinois at Urbana-Champaign. He spent much of the 1963 season with the Cardinals and batted .271 in 96 at bats. On September 29, 1963 he came in as a pinch-runner, replacing Stan Musial after Musial's final career hit. He was traded to the Braves on the eve of the 1964 campaign for catcher Bob Uecker. In part-time service over the rest of his MLB career his batting average never exceeded .218. He was a versatile performer who appeared at every position except shortstop and pitcher at the big league level (although he played every position in the minor leagues).
In his seven-season Major League career, Kolb batted .209 with six home runs and 29 runs batted in. He was the last Cardinal to wear uniform #20 before Baseball Hall of Fame outfielder Lou Brock, who was acquired two months after Kolb's trade in 1964. The number has since been retired in Brock's honor.