Kenyan-born American runner Jonah Koech has accepted a three-year suspension for blood doping and lost his 2025 U.S. 1,500-metre title, the U.S. Anti-Doping Agency announced on Monday.
USADA identified highly atypical blood values in Koech’s Athlete Biological Passport following a sample collected on July 30, 2025, confirming the use of a prohibited substance.
The disciplinary action strips the 29-year-old athlete of all results achieved after the July 2025 sample date.
This includes his U.S. outdoor title win in Eugene, Oregon, where he ran a personal best of 3:30.17, as well as his 13th-place finish at the 2025 World Athletics Championships in Tokyo.

USADA CEO Travis T. Tygart praised the outcome as proof that the Athlete Biological Passport effectively deters and detects cheating.
Koech’s three-year ban officially began on July 17, 2026.
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