Leon Francis Riley Sr. (August 20, 1906 – September 13, 1970) was an American professional baseball player who became a manager in the minor leagues. During a playing career that stretched from 1927 to 1942 and 1944 to 1949, Riley appeared in 2,267 minor league games for 21 different teams, with a brief trial with the 1944 Philadelphia Phillies during the World War II manpower shortage. He was the father of Lee and Pat Riley.