Alan Benton Foster (born December 8, 1946) is an American former professional baseball player.

He attended Los Altos High School (Hacienda Heights, California), and was listed as 6 feet (1.8 m) tall and 180 pounds (82 kg).

Foster was involved in a three-team deal on November 18, 1974 in which he was traded along with Sonny Siebert and Rich Folkers from the Cardinals to the Padres for Ed Brinkman who had been sent to San Diego with Bob Strampe and Dick Sharon from the Detroit Tigers for Nate Colbert.

Over his career, Foster won 48 games, lost 63, and had an earned run average of 3.74.

This biographical article relating to an American baseball pitcher born in the 1940s is a stub.