Thielen (hamstring) won't return to Sunday's contest in Las Vegas, Joe Person of The Athletic reports.
After connecting with QB Andy Dalton for a 31-yard touchdown snag late in the first half, Thielen stayed on the turf and was seen grabbing at his upper right leg, which was confirmed to be a hamstring injury. Thielen will end Week 3 action with three catches (on five targets) for 40 yards and a TD. With Thielen ruled out, Diontae Johnson should garner most of the attention from Dalton in the second half, while Jonathan Mingo, Xavier Legette and David Moore are the other healthy wide receivers on the Panthers' active roster.