Mary Cain has achieved a lifetime of track accolades at only 17-years-old. Cain first burst onto the national scene in 2012 as she climbed up the all-time lists and set a Penn Relays record, USA Junior record and earned a spot to compete in the Olympic Trials. In the fall of 2012 Cain began training under coach Alberto Salazar and competing independently of her high school. Cain demolished the record books during the 2013 indoor season with three races that set six indoor records. During the 2013 outdoor season, Cain set five records in three races and went on to become the youngest ever runner in the final of the women's 1500m at the World Championships, where she went on to finish 10th. Cain has continued her success into the 2014 season, winning the 1,500m national title at USA Indoors.