Harold Schacker (April 6, 1925 – October 2, 2015) was an American Major League Baseball pitcher who appeared in six games, all in relief, for the Boston Braves in 1945.

At the age of 20, the 6 ft 0 in (1.83 m), 190 lb (86 kg) right-hander was the tenth-youngest player to appear in a National League game that season.

[1][2][3][4] Schacker is one of many ballplayers who only appeared in the major leagues during World War II.

He made his major league debut on May 9, 1945 against the Pittsburgh Pirates at Braves Field, with his final appearance on June 14.

This biographical article relating to an American baseball pitcher born in the 1920s is a stub.