Noah Lyles is an American track and field sprinter who competes in the 60 meters, 100 meters and 200 meters events. His personal best of 19.31 seconds in the 200 m is the American record, and makes him the third fastest of all-time. From Wikipedia
The 17-year-old will make his international senior debut in Tokyo, competing in the 200m with potential to add the 100m and 4x100m relay.