Polamalu talks changes on Steelers' defense

[ESPN]

Troy Polamalu will play regularly with only his third free safety next season, and the switch from Ryan Clark to Mike Mitchell wasn't the only change that stood out to the eight-time Pro Bowler after he returned to the Steelers for the first time since th

http://espn.go.com/nfl/story/_/id/11099346/troy-polamalu-talks-changes-pittsburgh-steelers-defense