The Bengals cut Cook loose back in March and there has been no reported interest in his services since then.
Cook, 31, was an undrafted free agent out of Michigan State back in 2008. He signed on with the Vikings before joining the Bengals later on in the 2007 season.
Cook is among the best available centers in the league. He appeared in 72 games over the course of six seasons and made 66 starts.