Frank John Leja Jr. (February 7, 1936 – May 3, 1991) was an American professional baseball player. The first baseman appeared in a total of 26 games with the New York Yankees (1954–55) and Los Angeles Angels (1962) of Major League Baseball. He threw and batted left-handed, stood 6 feet 4 inches (1.93 m) tall and weighed 205 pounds (93 kg). He was traded to the Milwaukee Braves in May 1962 and finished his career in the minor leagues in 1963 with the Triple-A Toronto Maple Leafs of the International League.