Two-time Olympic finalist sprinter Erriyon Knighton received a four-year ban for violating anti-doping rules and is set to miss the 2028 Los Angeles Games. The Court of Arbitration for Sport partially upheld appeals from World Athletics and the World Anti-Doping Agency on Friday, approving their requests for a maximum four-year ban for the American athlete.

Knighton was charged in 2024 with the violation when a doping test found the presence of epitrenbolone, a WADA-prohibited anabolic steroid, in his system. He served a provisional suspension last year, and that time served from April 12 to June 19 will count toward his four-year suspension.

A United States tribunal previously ruled that Knighton should not be banned as he was not at fault nor negligent in his use of the substance. It

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