What remarkable feat is Effa Manley the first and only woman to achieve?

Effa Louise Manley (née Brooks; March 27, 1897 – April 16, 1981) was an American sports executive. She co-owned the Newark Eagles baseball franchise in the Negro leagues with her husband Abe Manley from 1935 to 1948. Throughout that time, she served as the team's business manager and fulfilled many of her husband's duties as treasurer of the Negro National League. In 2006, she posthumously became the first (and, as of March 2024, only) woman inducted into the National Baseball Hall of Fame, chosen by the Special Committee on Negro Leagues for her work as an executive.