Thielen (hamstring) is practicing Friday with a sleeve over his right leg, Chris Tomasson of the St. Paul Pioneer Press reports.
Thielen was a limited practice participant Wednesday and Thursday but is still aiming to return for Sunday's game in Kansas City. A full practice session would put him on track to do so, while another limited showing likely would leave him questionable for the contest. Another update will be available once the Vikings release their final injury report later Friday.