The Carolina Panthers are riding high after their first win of the season on Sunday against the Las Vegas Raiders, but they were knocked back down to

Adam Thielen, the team’s veteran wideout and its only 1,000-yard receiver last year, is expected to be placed on the team’s injured reserve list this week with a hamstring injury, according to a league source. That means that the 34-year-old receiver will be out at least for the next four games. NFL Network had the news first.

Panthers receiver Adam Thielen is headed to injured reserve with a severe hamstring injury and will miss at least the next four games, sources told ESPN.