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49ers-Cardinals inactives: Ahmad Brooks sidelined due to concussion

The San Francisco 49ers will be without linebacker Ahmad Brooks, as he is inactive following a week in the concussion protocol. We break down what it means.

The San Francisco 49ers and Arizona Cardinals released their inactive reports for Week 12, and we have one modest surprise. Linebacker Ahmad Brooks has been declared inactive, as it would appear he has not fully recovered from his Week 11 concussion. He was a DNP in practice on Wednesday and Thursday, and then limited on Friday while wearing the non-contact jersey. This deactivation would indicate he had some concussion symptoms yesterday or today.