Gary Alan Kolb (March 13, 1940 – July 3, 2019) was an American 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).

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.

Kolb collected his last base hit and two RBIs in his final major league at-bat when he singled in the 8th inning on September 1, 1969.