Sports Sha’Carri Richardson won’t run 100-meter dash at Tokyo Olympics after testing positive for marijuana July 2, 2021 Tyler Dragon, USA TODAY Comments Off on Sha’Carri Richardson won’t run 100-meter dash at Tokyo Olympics after testing positive for marijuana U.S. sprinter Sha'Carri Richardson tested positive for marijuana at the Olympic trials. She won't run the 100-meter and could miss the Tokyo Olympics.