Appeal after USA's Knighton cleared to run at Olympics

The Athletics Integrity Unit has launched an entreaty aft USA sprinter Erriyon Knighton was cleared complete a doping offence allowing him to compete astatine nan Paris 2024 Olympics.

The entreaty has been lodged pinch nan Court of Arbitration for Sport (Cas).

Knighton, 20, tested affirmative for trenbolone - a banned constituent utilized for musculus maturation - successful March but avoided a ban pursuing an independent arbitrator's ruling.

The United States Anti-Doping Agency (Usada) said nan independent arbitrator ruled he much than apt digested nan banned constituent by eating contaminated meat.

The 200m world metallic medallist went connected to compete astatine nan Olympics and vanished 4th successful nan men's 200m final.

"This entreaty is against nan determination of an arbitration tribunal successful nan United States that nan jock established nary responsibility aliases negligence," nan AIU said connected Wednesday.

Usada main executive Travis Tygart said nan American assemblage "understands" nan AIU's determination and nan "real issue" is nan "bad rule" group by nan World Anti-Doping Agency (Wada).

"Trenbolone, nan constituent successful Knighton’s case, is simply a known livestock enhancer and known to beryllium recovered successful nan nutrient supply," he said.

It is nan latest remark successful a long-running group of disagreements betwixt Usada and Wada.

In June, Wada said it was considering an appeal of nan Knighton lawsuit to Cas, pinch a spokesperson adding that they "dare to think" Tygart would person responded otherwise if it was a Chinese athlete.

Tygart had demanded sanctions connected Chinese athletes earlier nan Games aft 23 swimmers who competed astatine nan 2021 Tokyo Games were cleared for unintentionally ingesting bosom medicine trimetazidine (TMZ). Eleven of them competed successful Paris.