Mary Cain, Bronxville HS, Bronxville, NY
In both name and speed, Mary Cain has established herself as the second coming of Decker Slaney. The teenage speedster turned professional as a senior in high school after earning a laundry list of accolades more befitting to an athlete twice her age. She holds National High School Records for 800m (1:59.51), 1,500m (4:04.62), 3,000m (8:58.48), 5,000m (15:45.46) and the Indoor 2 Mile (9:38.68). The half mile record is particularly impressive as Cain became the first American female prep to break two minutes. At just 17, she finished runner-up in the 1,500m at the 2013 USA Outdoor Track and Field Championships to become the youngest American to ever represent the United States at the World Championships. A few weeks later, she became the youngest athlete ever to make an IAAF World Championships final in Moscow. In her first year as a pro, the 18-year-old Cain won the USA Indoor Track and Field Championship for 1,500m, finished runner-up in the distance at the USA Outdoor Track and Field Championship and won the 2014 IAAF World Junior Champion for 3,000m. She trains with the Nike Oregon Project.