NASHVILLE, Tenn. (AP) — The Tennessee Titans have released safety Michael Griffin after nine seasons in their first step toward improving their secondary.

The Titans announced the move Tuesday.

A first-round draft pick in 2007 at No. 19 overall out of Texas, Griffin was a two-time Pro Bowl pick in 2008 and 2010 whose 141 games played tied Corey Graham of Buffalo for most games played by a safety between 2007 and 2015. Griffin had 25 interceptions and also became the fifth player in franchise history with 900 career tackles and the most by a safety.

Griffin wrote on Twitter that he knew his time would come.

He wrote, "I cherished every minute of it. It's been real Tennessee. Thanks for everything. #nextchapter."

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