About Mary Cain (athlete)
Mary Cecilia Cain is an American-born Irish professional middle distance runner from Bronxville, New York. Cain was the 2014 World Junior Champion in the 3000 meter event. She is the youngest female athlete ever to represent the United States at a track and field World Championships meet after competing in the 2013 World Championships in Athletics in Moscow aged 17 years and 3 months. At the world level since 2000, indoor marks superior to the outdoor record are now accepted. But the record for 3000 meters at the High School level is administered to by Track and Field News which sets its own standards.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.