Who was the founder of the sports league Mirtha Marrero played in?
Mirtha Marrero: Mirtha Marrero [Fernández] is a former pitcher who played from 1948 through 1953 in the All-American Girls Professional Baseball League. All-American Girls Professional Baseball League: The All-American Girls Professional Baseball League was a women's professional baseball league founded by Philip K. Wrigley which existed from 1943 to 1954.
Philip K. Wrigley