The New England Patriots fear defensive end Henry Anderson suffered a torn pectoral muscle in Sunday night's loss to the Tampa Bay Buccaneers, NFL Network reported Monday.
If confirmed by an MRI, the injury would likely end Anderson's season.
He only played three snaps before exiting Sunday's game.
Anderson, 30, has recorded three tackles in four games in his first season with the Patriots. He has 170 tackles, 44 quarterback hits and 11.5 sacks in 78 games (43 starts) with the Indianapolis Colts (2015-17), New York Jets (2018-20) and New England.
The Colts drafted him in the third round in 2015.