Harry Loran "Nemo" Leibold (February 17, 1892 – February 4, 1977) was an outfielder in Major League Baseball from 1913 to 1925. He played for the Cleveland Naps, Chicago White Sox, Boston Red Sox, and Washington Senators. He stood at 5 ft 6 in (1.68 m) and was nicknamed for the comic strip character Little Nemo.
Leibold began his professional career in 1911 with the minor league Milwaukee Brewers of the American Association. In 1913, he was traded to the Cleveland Naps, and he immediately broke into the starting lineup. He struggled early in 1915 and was released to the White Sox. In Chicago, Leibold was a member of two American League championship teams. He patrolled right field, alongside sluggers Shoeless Joe Jackson and Hap Felsch. Leibold hit well in 1919 and set a career-high in OPS+ with 113; however, he batted .056 in the 1919 World Series. It was later discovered that he was one of just three regulars on the team not accused in the Black Sox Scandal.
Leibold was sent down to the minor leagues in 1926. He was a player-manager for the Columbus Red Birds from 1928 to 1932, then managed various other teams until 1948.