Coach Mike Zimmer confirmed after Sunday's 29-27 loss to the Lions that Thielen has a sprained ankle, Chris Tomasson of the St. Paul Pioneer Press reports.
Prior to his exit from the contest, Thielen caught one of his two targets for no gain. The wideout's chances of playing this Thursday against the Steelers will clearly hinge on the severity of his ankle sprain, but the short turnaround between games could threaten his Week 14 availability.