Carlson (knee) left the Browns' preseason game against the Jaguars on Saturday and is officially out for the remainder of the game, Scott Petrak of the Elyria Chronicle-Telegram reports.
Carlson hurt his knee on a bobbled catch he made in the first half of the game. The third-year tight end played in all 16 games for the Browns last season, primarily on special teams, and as long as his injury isn't serious his contributions to special teams should give him a good chance at making the roster.