Two-time Olympic finalist Erriyon Knighton was banned for four years on Friday in a doping case of an anabolic steroid that rules the 21-year-old United States sprinter out of the 2028 Los Angeles Games .

The Court of Arbitration for Sport said its judges upheld separate appeals by the World Anti-Doping Agency and track and field investigators filed after Knighton was cleared by a tribunal in the U.S. that accepted he was contaminated by eating meat.

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WADA and the Athletics Integrity Unit argued the evidence that had been presented was statistically impossible and asked for a maximum four-year ban, the court said.

Knighton is the sixth-fastest man in track history over 200 meters, with a best time of 19.49 sec

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