Gil Roberts, who won Rio Olympic gold on the US mens 4x400-meter relay, was cleared of doping after an arbitrator found he ingested a banned substance by kissing his girlfriend.
According to a final US Anti-Doping Agency (USADA) report in the matter unveiled Thursday, the ruling that cleared Roberts of wrongdoing turned on his girlfriend, Alex Salazar, having taken medicine for a sinus infection that contained the banned masking agent probenecid.