After Knighton was cleared by USADA, he qualified for the 200 meters at Olympic trials, then finished fourth in Paris. He did not compete on the relay teams.

United States sprinter Erriyon Knighton went to court Monday to defend his claim he was contaminated in a positive doping ...

Knighton was cleared by the U.S. Anti-Doping Agency before the Olympic trials after testing positive for a banned drug Trenbolone, which is often found in livestock.

Knighton was cleared by the U.S. Anti-Doping Agency before the Olympic trials after testing positive for a banned drug Trenbolone, which is often found in livestock.

LAUSANNE, Switzerland — United States sprinter Erriyon Knighton went to court Monday to defend his claim he was contaminated in a positive doping test case that risks a ban from the next world ...

Knighton was cleared by the U.S. Anti-Doping Agency before the Olympic trials after testing positive for a banned drug Trenbolone, which is often found in livestock.

United States sprinter Erriyon Knighton went to court Monday to defend his claim he was contaminated in a positive doping test.

United States sprinter Erriyon Knighton went to court Monday to defend his claim he was contaminated in a positive doping test. The case risks leading to a ban for Knighton from the next world ...