The Cincinnati Bengals placed Pro Bowl linebacker Vontaze Burfict on injured reserve.
He suffered a knee injury against the Baltimore Ravens.
He has also dealt with concussions.
He had 29 tackles and a fumble recovery this season.
The Bengals activated rookie quarterback A.J. McCarron from the reserve non-football injury list.
McCarron had a shoulder injury.
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Aaron Wilson covers the Ravens for The Baltimore Sun