Triple Olympic medalist Andre De Grasse looked rusty in his first race since July, finishing fourth in the Drake Relays 100m after a slow start on Saturday.
American Isiah Young won in 10.02 seconds, .01 ahead of countryman Mike Rodgers. De Grasse, who took 100m bronze and 200m silver in Rio, was fourth in 10.15 with a 1.9 meter/second tailwind.
De Grasse made Drake his comeback meet from a strained right hamstring that kept him from competing at the 2017 World Championships.
De Grasse is scheduled to race at the first two Diamond League meets this season the next two weeks in Doha and Shanghai with possible showdowns against Americans Justin Gatlin and Christian Coleman.