A positive drug test cost Sha’Carri Richardson the chance to run for Olympic gold in Tokyo, but the star American sprinter will face the all-Jamaican trio of 100-meter medalists next week at the Prefontaine Classic in Oregon.After finishing first at that distance at the U.S. Olympic trials in June, the 21-year-old Richardson was suspended for a month by the U.S. Anti-Doping Agency after testing positive for marijuana, costing her a spot on the U.S. track and field squad.Jamaican sprinters Elaine Thompson-Herah, Shelly-Ann Fraser-Pryce and Shericka Jackson finished in the top three spots, respectively, in the 100 meters in Tokyo – with Thompson-Herah setting an Olympic record with a time of 10.61 seconds.