Jacob Nelson Fox (December 25, 1927 – December 1, 1975) was an American professional baseball player. Fox was one of the best second basemen of all time, and the third-most difficult hitter to strike out in Major League Baseball (MLB) history. Fox played in the big leagues from 1947 through 1965 and spent the majority of his career as a member of the Chicago White Sox; his career was bookended by multi-year stints for the Philadelphia Athletics and, later, the Houston Astros.