PITTSBURGH -- The Steelers' tight end depth is tight, at least for now.
Third-year tight end Xavier Grimble underwent surgery to repair a torn ligament in his right thumb/wrist area, according to a source. Grimble hopes to return for Week 1 but will most likely miss the rest of the preseason. He suffered the injury in a practice and did not play in Thursday night's loss at Green Bay.
Grimble has 16 catches for 150 yards and three touchdowns from 2016-17 as the team's No. 3 option at the position.
Starter Vance McDonald missed most of training camp with a foot issue that will likely keep him out of Saturday's preseason matchup against Tennessee, leaving Jesse James as the only healthy tight end with an NFL catch.