If that's the case, Thomas will require season-ending surgery.
Thomas has never missed a snap since being the No. 3 overall pick in the 2007 NFL Draft, let alone a full game.
An MRI confirmed that Browns left tackle Joe Thomas suffered a torn triceps on Sunday. His legendary durability was honored earlier this season when he played his 10,000th consecutive snap, believed to be an National Football League record. It is a devastating blow for the Browns which also ends Thomas' streak of 167 consecutive starts. I think I was enough of a realist to understand that I wasn't going to be able to continue on forever without missing a play.
Thomas, 32, a pro bowl offensive lineman who was named 2016's Walter Payton Man of the Year, has one year left on his contract. "It was just a matter of time, and unfortunately it happened in Week 7".
"He's one of the best of the best", Browns coach Hue Jackson said after the 12-9 loss to Tennessee.
Thomas left the game to a standing ovation before trotting to the locker room.