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

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.

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 ...

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 ...

A two-time Olympic finalist in the 200 meters aged just 21, Knighton was cleared to run at the Paris Summer Games last year only after an American tribunal ruled he was not at fault for the ...