The 1992 film comedy, A League of Their Own, revitalized interest in and helped memorialize a neglected chapter of sports history: The All-American Girls Professional Baseball League (AAGPBL). With America's men joining up to fight in World War II, Chicago Cubs owner Philip K. Wrigley, the chewing-gum mogul, thought that women playing baseball might help keep interest in the sport alive until the war was over and the men returned home. As depicted in the film, in 1943, the league's first year, there were four teams: the Rockford Peaches, the Racine Belles, the Kenosha Comets, and the South Bend Blue Sox. When it became evident that the major leagues would not be seriously affected by the war, Wrigley sold the league to Chicago advertising executive Arthur Meyerhoff. But after the men returned home, instead of fading into oblivion the AAGPBL prospered due...