The doping case involving U.S. sprinter Erriyon Knighton’s claims of eating contaminated meat is being appealed and will be sent to the Court of Arbitration for Sport, while Knighton’s attorney suggested the sprinter could be “collateral damage” in an ongoing feud between anti-doping authorities across the globe.

The Athletics Integrity Unit, which polices anti-doping on a global level for track and field, announced today, that it was appealing the “no-fault” finding issued by the U.S. Anti-Doping Agency before this summer’s Olympic trials.

Knighton tested positive for a banned drug Trenbolone, which is often found in livestock and has been linked to a number of contamination cases over the years. Knighton said he ate oxtail from a bakery in central Florida that was contaminated.

Knighton was cleared by USADA, and qualified for the 200 meters at US Olympic trials in June, then finished fourth in Paris.

His case was singled out last week by anti-doping authorities in China, who suggested U.S. and Chinese athletes aren’t held to the same standard, an argument made in the context of the withering criticism the country and the World Anti-Doping Agency have faced over the handling of contamination cases involving Chinese athletes.