Branch is in the concussion protocol after leaving Sunday's 20-13 win over the Cardinals with a neck injury, Nolan Bianchi of The Detroit News reports.

EDGE Analysis

The starting safety will have to clear the NFL's five-step concussion protocol to play next week against the Seahawks. Branch played a major role in a stellar defensive effort for the Lions on Sunday, finishing with nine tackles (six solo), including one for a loss, and two passes defensed. Brandon Joseph and Loren Strickland are the healthy backup safeties on Detroit's roster at the moment.