Troy Polamalu (S)-Pittsburgh Steelers

Polamalu's 2012 season was derailed by a lingering calf injury that limited him to seven games. The injury raised questions about whether age was catching up to him. The 32-year-old has modified his off-season training regimen in an effort to put the injury questions behind him. Polamalu could be living on borrowed time because he has the second-highest safety salary-cap number for 2014 at $10,887,500. The past off-season has not been kind to veteran safeties with extremely high cap numbers. Charles Woodson's and Michael Huff's cap numbers were $9,437,500 and $11,288,500, respectively, when they were released.