This 17-year-old is already beating the world’s best runners. Senior year is next.In the span of just one year, Cooper Lutkenhaus has graduated from a newcomer in elite running to the U.S. 800-meter champion.Cooper Lutkenhaus reacts as he wins the Men's 800 meters final during the 2026 USATF Outdoor Track & Field Championships at Icahn Stadium in New York, on Sunday.Caleb Bowlin / Getty ImagesJuly 28, 2026, 1:20 PM EDTWhen Cooper Lutkenhaus shocked the running world last year, he clasped his hands around his head, his mouth agape and eyes wide in surprise. Just a moment.We are getting your experience ready.