There are fears that Carlson suffered a season-ending knee injury in Saturday's preseason opener against Jacksonville, Jake Trotter of ESPN.com reports.
The severity of Carlson's knee injury hasn't been confirmed yet, but it sounds like he'll be facing a lengthy absence. This is an unfortunate turn of events for the tight end, who had been enjoying a strong camp and was on track to secure a spot on the Browns' 53-man roster.