Wikipedia - Marlen Esparza
Marlen Esparza (born July 29, 1989) is an American professional boxer who is the former WBC, WBO, WBA and Ring female world flyweight champion. As an amateur, in 2012 she became the first American female boxer to qualify for the Olympics, in the first year that women's boxing was an Olympic event, going on to win a bronze medal in the women's flyweight division at the London Olympics. This made her the first American woman winner of any Olympic boxing medal.