John Alfred Marcum (September 9, 1909 – September 10, 1984), nicknamed "Footsie" and "Moose", was an American professional baseball pitcher. He played for seven seasons in Major League Baseball (MLB) with the Philadelphia Athletics, Boston Red Sox, St. Louis Browns, and Chicago White Sox. Over seven seasons, he had a 65–63 record and a 4.66 earned run average (ERA).