FILE -Erriyon Knighton, of the United States, competes in a Men's 200-meter heat during the World Athletics Championships in Budapest, Hungary, Wednesday, Aug. 23, 2023. Sprinter Erriyon Knighton tested positive for a banned substance that an arbitration panel determined came from contaminated meat, a decision that keeps the 200-meter specialist eligible to run at the upcoming Olympic trials, Wednesday, June 19, 2024. (AP Photo/Bernat Armangue, File)
FILE - Erriyon Knighton, of the United States, left, wins a heat in the men's 200-meter run at the World Athletics Championships on Monday, July 18, 2022, in Eugene, Ore. Sprinter Erriyon Knighton tested positive for a banned substance that an arbitration panel determined came from contaminated meat, a decision that keeps the 200-meter specialist eligible to run at the upcoming Olympic trials, Wednesday, June 19, 2024. (AP Photo/Ashley Landis, File)
FILE - Erriyon Knighton, of the United States, wins a heat during the men's 200-meter semifinal run at the World Athletics Championships on Tuesday, July 19, 2022, in Eugene, Ore. Sprinter Erriyon Knighton tested positive for a banned substance that an arbitration panel determined came from contaminated meat, a decision that keeps the 200-meter specialist eligible to run at the upcoming Olympic trials, Wednesday, June 19, 2024. (AP Photo/Ashley Landis, File)