Mary Cain
ABOUT MARY CAIN
Middle to long-distance runner made history by becoming the youngest-ever runner on the U.S. World Championship team in 2013.
She was a national and state champion runner at Bronxville High School.
She broke a 1500m girl's outdoor record at the 2012 World Junior Championships.
She has three sisters: Anne, Catherine and Mairead.
She and Allyson Felix will represent the U.S. at the 2013 Track and Field World Championships.
