Lions coach Dan Campbell said No. 1 receiver Tyrell Williams is in concussion protocol after leaving the game following a helmet-to-helmet hit in the third quarter.
Williams retreated to the locker room, accompanied by trainers, following the play. He returned to the bench area a few minutes later, but never re-entered the game.
The Lions relied heavily on tight end T.J. Hockenson and running backs D'Andre Swift and Jamaal Williams in the pass game Sunday, even before Tyrell Williams' injury.