 He also served in the majors as chief assistant to St. Louis Cardinals vice president and de facto general manager William Walsingham Jr. during the late 1940s and early 1950s.A three-sport star at Colgate University, Sisler had a brief playing career in minor league baseball.Baseball Reference lists him as having played from 1939–1941 in the lowest levels of the minors in the organizations of St. Louis' two MLB teams of the era, the Browns and the Cardinals.