Athletics (sprint) · United States · USADA (charge), US arbitration tribunal (first instance), appeals by World Athletics and WADA
Erriyon Knighton: doping case, ban and appeal
Serving ban CAS imposed a four year ban starting 12 September 2025, with credit for a provisional suspension served in 2024.
Ban length4 years (CAS, 12 September 2025). The first instance tribunal had imposed no ineligibility.
Start12 September 2025
Violation
Presence of a prohibited substance: trenbolone (metabolite epitrenbolone, S1.1 anabolic androgenic steroid), in an out of competition sample1
Results disqualified
Results from 26 March 2024 to 12 April 2024
Appeals
- Arbitration tribunal (first instance, US), 19 June 2024: No Fault or Negligence, no period of ineligibilityAfter USADA charged him on 28 May 2024, the tribunal found he bore no fault or negligence.1
- CAS (appeals by World Athletics and WADA), 12 September 2025: Upheld in partKnighton argued the result came from eating contaminated oxtail. The panel found "there is no proof that would support the conclusion" that imported oxtail in the US would likely contain trenbolone at the level needed. It imposed four years from 12 September 2025 with credit for the provisional suspension of 12 April to 19 June 2024.1
Sources
- Court of Arbitration for Sport, CAS upholds appeals by World Athletics and WADA to impose 4 year ban on sprinter Erriyon Knighton (USA), CAS media release 10800 (12 September 2025)