Sha'Carri Richardson reacts after finishing last in the 100m race during the Wanda Diamond League Prefontaine Classic at Hayward Field, in Eugene, Ore., on Aug. 21, 2021. Jonathan Ferrey/Getty Images
Sha'Carri Richardson finished in last place in the 100-meter dash in her return to the track Saturday at the Prefontaine Classic on Saturday in Eugene, Ore.
Richardson, 21, was suspended for 30 days for testing positive for a substance found in marijuana, which forced her to miss the Olympics.
