James Joseph Dykes (November 10, 1896 – June 15, 1976) was an American third and second baseman, manager and coach in Major League Baseball who played for the Philadelphia Athletics and Chicago White Sox from 1918 to 1939. He batted over .300 five times and led the American League in assists once at second base and twice at third base, ending his career sixth in AL history in games at third base (1,253), and seventh in putouts (1,361), assists (2,403), total chances (3,952) and double plays (199). When he retired, he ranked eighth in AL history in games played (2,282), and ninth in at bats (8,046). He holds the Athletics franchise record for career doubles (365), and formerly held team marks for career games and at bats. He went on to become the winningest manager in White Sox history with 899 victories over 13 seasons, though his teams never finished above third place; he later became the first manager in history to win 1,000 games without capturing a league pennant.

Born in Philadelphia, Pennsylvania, Dykes played for three local teams at age 16 in 1913. The first was "his father's Penn Street Boys Club"; the second one paid 50 cents a game plus carfare (to Ardmore on the Main Line); the third paid $1 a game. By 19 he played in the Delaware County League, which the major leagues declared an outlaw league a few years later, for infringing their control of the professional sport.