Aiyuk (hamstring) looked unencumbered while running sprints on a side field Thursday, and he's on track to be a full-go Week 1 at Detroit, David Lombardi of The Athletic reports.
Aiyuk has been out for about a week now, after catching one pass for three yards in San Francisco's second preseason game (his only appearance this August). A return to practice should be coming at some point within the next week, as the 49ers maintain that Aiyuk's hamstring injury is minor.