Overview

• Sport’s top court partially upheld appeals by World Athletics and WADA, imposing a four-year sanction that starts immediately with credit for time served from April 12 to June 19, 2024.
• The panel found no proof that oxtail imported into the United States would contain trenbolone at levels capable of causing the positive test, calling the scenario statistically impossible.
• Retroactive disqualification is limited to March 26–April 12, 2024, so results outside that window, including his fourth place in the Paris Olympic 200m, stand.
• The suspension extends into July 2028, putting his availability for the Los Angeles Olympics at risk, and further challenge is generally limited to procedural appeal in Switzerland.
• Knighton tested positive for epitrenbolone in an out-of-competition sample on March 26, 2024, after which a U.S. tribunal initially cleared him to compete, and he later missed selection for the Tokyo World Championships.