American middle-distance runner Jonah Koech has received a three-year ban from athletics for blood doping, the U.S. Anti-Doping Agency (USADA) announced. Koech's violation was identified through his Athlete Biological Passport (ABP), which monitors an athlete's blood values over time to detect doping.
Koech, 29, accepted the ban for the use of a prohibited substance or method. As a result of the ban, he has been stripped of his surprise victory in the men's 1500m at the 2025 U.S. Outdoor Championships, where he set a meet record of three minutes 30.17 seconds. He had finished ahead of Ethan Strand and Olympic gold medalist Cole Hocker in that race.