The All-American Girls Professional Baseball League (AAGPBL) was the first, and to date, the only women’s professional baseball league in United States history. Yet many people are unaware of the league’s existence. The purposes of this paper are to (1) review the historical and research literature on the AAGPBL, (2) examine the reflections on gender issues within this literature, and (3) discuss how these issues contributed to the success and failure of the AAGPBL. The published historical documentation and archived artifacts of the AAGPBL are quite thorough; however, research on the league is limited. Gender issues, such as the female apologetic, marginalization, and feminist reconstruction of sport are evident throughout the league’s existence. These issues enhanced the league’s success, but also contributed to its demise. The pioneering efforts of the women of the AAGPBL created a new vision of opportunity for girls and women in sport that still resonates today.