 After that he coached and scouted for the Brewers for several years, before becoming a manager in 1939 with the Tarboro Serpents in the Class-D Coastal Plain League.From 1941 to 1942, Stumpf managed and eventually caught for the Janesville Cubs of the Wisconsin State League, until he heard about the All-American Girls Professional Baseball League, an innovative circuit conceived by Philip K. Wrigley, a chewing-gum magnate who had inherited the Chicago Cubs Major League Baseball franchise from his father.Stumpf took the opportunity to get news at first hand, because Wrigley was his employer at the time.