Jack Glasscock (July 22, 1859, Wheeling, West Virginia - February 24, 1947, Wheeling) was a baseball player for the Cleveland Blues (1879-1884), Cincinnati Outlaw Reds (1884), St. Louis Maroons (1885-1886), Indianapolis Hoosiers (1887-1889), New York Giants (1890-1891), St. Louis Browns (1892-1893), Pittsburgh Pirates (1893-1894), Louisville Colonels (1895), and the Washington Senators (1895). Pebbly Jack played shortstop bare-handed. He hit for the cycle on August 8, 1889.