What happened: Gray sustained a concussion in a utility task vehicle accident last week. [The Titans confirmed the injury](https://www.tennesseetitans.com/news/titans-lb-cedric-gray-in-concussion-protocol-after-utv-accident).

Why it matters: Tennessee must replace Gray, a listed starting linebacker. Cody Barton and Owen Pappoe are among the other linebackers on the 53-man roster.

What to watch: Head coach Robert Saleh said Mohamoud Diabate will be elevated from the practice squad for Sunday's game.