John Ludy Riddle (October 3, 1905 – December 15, 1998) was an American professional baseball player and coach.

He appeared in 98 games in Major League Baseball as a reserve catcher for the Chicago White Sox (1930), Washington Senators (1937), Boston Bees (1937–38), Cincinnati Reds (1941 and 1944–45) and Pittsburgh Pirates (1948).

Riddle spent 19 years in minor league baseball, including a dozen seasons as a member of the Indianapolis Indians of the top-level American Association.

Riddle made his major league debut on April 17, 1930 (Opening Day) against the Cleveland Indians at Comiskey Park.

Riddle died at the age of 93 in Indianapolis, where he ultimately made his home after his long tenure with the Indians.