87. Justine SiegalThe first woman to serve as a coach for a major league team, Siegal helms Baseball For All, a non-profit that aims to expand girls’ participation in baseball. In 2015, Siegal spent two weeks as a coach at the Oakland Athletics’ instructional league. Next week, Major League Baseball will host its first girls’ baseball tournament in conjunction with Jackie Robinson Day in Los Angeles, featuring a large group of Baseball for All alums. As MLB aims to nurture growth among youth players, Siegal will be a key figure in tapping into the girls’ market.