Then 17-year-old Cain broke the high school record in the 800 in 1:59.51, placing fifth in an elite field that included Olympic bronze medalist Yekaterina Poistogova and Janeth Jepkosgei, third in last year's world championships.

NPR: Gatlin Wins 100 At The Prefontaine Classic

He recently came out of retirement to coach Olympic sprinter Walter Dix, who is a bronze medalist in both the 100 and 200 meter events.

NPR: Anchor-Leg Strength May Be Hurting Relay Handoffs