Harold David Ock (March 17, 1912 – March 18, 1975) was a professional baseball player who played catcher in one game for the 1935 Brooklyn Dodgers.
He graduated from Bushwick High School before attending Lehigh University where he played college baseball and football. In a 1933 baseball game against Villanova, he played catcher without a facemask or shinguards. He was elected captain of the Lehigh Engineers football team for their 1934 season.