Thielen (ankle) is active for Sunday's game against the Rams, Andrew Krammer of the Minneapolis Star Tribune reports.
Sidelined for the past two games with a left high-ankle sprain, Thielen was able to practice twice on a limited basis this week, which was good enough for the Vikings to sign off on him making his return to the lineup. Unless his ankle acts up during the contest, Thielen should be in store for a full snap load while working alongside Justin Jefferson and K.J. Osborn in three-receiver sets.