Kenya’s former New York marathon champion Korir gets five-year doping ban

Al Jazeera
March 30, 2026
3 min read

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Julius Korir, Kenya's former New York marathon champion, received a five-year doping ban for testing positive for blood cell-stimulating substance.

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Julius Korir, Kenya's former New York marathon champion, has received a five-year doping ban after testing positive for a substance that stimulates red blood cell production during out-of-competition testing. The drug Korir tested positive for enhances oxygen-carrying capacity in the blood, giving endurance athletes a significant performance advantage. The ban effectively ends competitive participation for one of Kenya's notable distance runners during a critical period of his career. Doping violations in marathon and distance running have drawn increased scrutiny from anti-doping authorities as the sport works to maintain integrity at elite levels. Korir joins a growing list of African distance runners sanctioned for performance-enhancing drug use in recent years.

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