Bengals released S Chris Crocker. Crocker is entering his age-32 season with three consecutive years of nagging knee injuries. A 38-game starter in Cincinnati, Crocker graded out below average in coverage and run support by Pro Football Focus for 2011. Outside of corner/safety hybrid Jason Allen, the Bengals have no proven depth beyond Reggie Nelson at safety. Alabama's Mark Barron could be an option in the first round.