Thielen (hamstring) is on track to play Sunday against the Chargers for the first time since Week 9, Adam Schefter of ESPN reports.
Thielen made an appearance on the practice field Wednesday, his first activity since Nov. 30. As mentioned by Schefter, the Vikings expect to have Thielen back in the lineup Week 15, so long as he avoids a setback with his right hamstring. The Vikings will indicate whether Thielen was a limited or full participant in Wednesday's practice when they release their first report of Week 15 later in the day.