Cook joined the Bengals in 2007 and spent his first season on the practice squad. He then became Cincinnati's top player at the position, starting 66 of the 73 games he appeared in.
Cook started all 16 games in 2013.
He'll be an unrestricted free agent.
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Aaron Wilson covers the Ravens for The Baltimore Sun.Follow @footballpost on Twitter for the latest news
This story originally appeared on Nationalfootballpost.com
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