FILE - In this Sept. 7, 2014, file photo, Pittsburgh Steelers strong safety Troy Polamalu (43) takes the field during introductions for an NFL football game against the Cleveland Browns in Pittsburgh. Polamalu's iconic football career is over. The eight-time Pro Bowl safety told the Uniontown Herald-Standard he informed Steelers chairman Dan Rooney on Thursday night, April 9, 2015, he will retire rather than return for a 13th season. (AP Photo/Gene Puskar, File)

Baltimore Ravens fullback Kyle Juszczyk (44) is tackled by Pittsburgh Steelers cornerback William Gay (22) and Pittsburgh Steelers strong safety Troy Polamalu, who goes airborne after the collision during the second half of an NFL wildcard playoff football game, Saturday, Jan. 3, 2015, in Pittsburgh. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers strong safety Troy Polamalu (43) hits Cleveland Browns wide receiver Andrew Hawkins (16) after making a catch in the NFL football game on Sunday, Sept. 7, 2014 in Pittsburgh. (AP Photo/Don Wright)

Pittsburgh Steelers strong safety Troy Polamalu (43) tackles Indianapolis Colts wide receiver T.Y. Hilton (13) during an NFL football game against the Indianapolis Colts on Sunday, October 26, 2014 in Pittsburgh. The Steelers won the game 51 to 34. (AP Photo/Peter Read Miller)

Pittsburgh Steelers strong safety Troy Polamalu (43) walks off the field after an NFL football game against the Indianapolis Colts in Pittsburgh, Sunday, Oct. 26, 2014. The Steelers won 51-34.(AP Photo/Gene J. Puskar)

Pittsburgh Steelers strong safety Troy Polamalu (43) plays during the during the second half of a 30-17 loss to the Baltimore Ravens in an NFL wildcard playoff football game, Saturday, Jan. 3, 2015, in Pittsburgh. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers' Troy Polamalu runs onto the field before an NFL football game against the Buffalo Bills, Sunday, Nov. 10, 2013, in Pittsburgh. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers strong safety Troy Polamalu , left, intercepts a pass intended for Miami Dolphins wide receiver Brian Hartline (82) and returns it for a touchdown during the second half of an NFL football game in Pittsburgh, Sunday, Dec. 8, 2013. (AP Photo/Don Wright)

Pittsburgh Steelers strong safety Troy Polamalu (43) runs downfield in the third quarter of an NFL football game against the Cleveland Browns in Pittsburgh, Sunday, Dec. 30, 2012. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers strong safety Troy Polamalu (43) strips the ball from Cincinnati Bengals tight end Jermaine Gresham (84) in the second half of an NFL football game in Pittsburgh, Sunday, Dec. 15, 2013. The Steelers won 30-20. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers strong safety Troy Polamalu (43) hits Baltimore Ravens wide receiver Tandon Doss (17) after he made a catch in the fourth quarter of an NFL football game on Sunday, Oct. 20, 2013, in Pittsburgh. (AP Photo/Don Wright)

Pittsburgh Steelers strong safety Troy Polamalu (43) runs out of the tunnel before an NFL football game against the Tennessee Titans on Sunday, Sept. 8, 2013, in Pittsburgh. Tennessee won 16-9.(AP Photo/Don Wright)

Pittsburgh Steelers strong safety Troy Polamalu (43) tackles San Francisco 49ers wide receiver Kyle Williams (10) in the second quarter of an NFL football game in San Francisco, Monday, Dec. 19, 2011. (AP Photo/Marcio Jose Sanchez)

Pittsburgh Steelers strong safety Troy Polamalu walks off the field after an NFL football game against the Cleveland Browns Sunday, Nov. 24, 2013, in Cleveland. Pittsburgh won the game 27-11. (AP Photo/David Richard)

Pittsburgh Steelers' Troy Polamalu smiles during the first half of an NFL football game against the Buffalo Bills, Sunday, Nov. 10, 2013, in Pittsburgh. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers strong safety Troy Polamalu (43) dives for the end zone after intercepting a pass for a touchdown during the second half of an NFL football game against the Miami Dolphins in Pittsburgh, Sunday, Dec. 8, 2013. (AP Photo/Don Wright)

Pittsburgh Steelers safety Troy Polamalu, right, celebrates with teammate James Harrison after intercepting a pass intended for Cincinnati Bengals receiver Terrel Owens (81) in the endzone during the fourth quarter of an NFL football game in Pittsburgh, Sunday, Dec 12, 2010. It was the second interception for Polamalu in a 23-7 Steelers win. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers safety Troy Polamalu (43) celebrates after defensive end Brett Keisel recovered Baltimore Ravens fumble in the third quarter during an NFL divisional playoff game in Pittsburgh Saturday, Jan. 15, 2011. The Steelers won 31-24. (AP Photo/Tom E. Puskar)

Pittsburgh Steelers safety Troy Polamalu celebrates after a 24-19 win over the New York Jets in the AFC Championship NFL football game in Pittsburgh, Sunday, Jan. 23, 2011. The Steelers advance to the Super Bowl to face the Green Bay Packers. (AP Photo/Keith Srakocic)

Pittsburgh Steelers NFL football player Troy Polamalu, left, poses next to "Legendaryous Troy," his wax likeness unveiled at Madame Tussauds in New York, Tuesday, Oct. 11, 2011. The wax figure required twice the amount of hair of any other creation in the history of the famed attraction, according to a press release statement. (AP Photo/Bebeto Matthews)

Pittsburgh Steelers' defender Troy Polamalu (43) tackles Buffalo Bills' wide receiver David Nelson (86) during the second half of an NFL football game in Orchard Park, N.Y., Sunday, Nov. 28, 2010. Pittsburgh won, 19-16. (AP Photo/Mike Groll)

Pittsburgh Steelers' defender Troy Polamalu (43) breaks up a pass intended for Buffalo Bills' wide receiver Steve Johnson (13) during the second half of an NFL football game in Orchard Park, N.Y., Sunday, Nov. 28, 2010. Pittsburgh won, 19-16. (AP Photo/Mike Groll)

Pittsburgh Steelers safety Troy Polamalu in action against the Cincinnati Bengals in the second half of an NFL football game, Monday, Nov. 8, 2010, in Cincinnati. (AP Photo/Ed Reinke)

Pittsburgh Steelers safety Troy Polamalu, front, intercepts a pass intended for Atlanta Falcons wide receiver Roddy White in the fourth quarter of the NFL football game in Pittsburgh, Sunday, Sept. 12, 2010. Pittsburgh won 15-9 in overtime. (AP Photo/Keith Srakocic)

Pittsburgh Steelers safety Troy Polamalu (43) defends as Tennessee Titans tight end Bo Scaife tries to catch a pass in an NFL football game in Pittsburgh on Sept. 10, 2009. (AP Photo/Keith Srakocic, File)

Pittsburgh Steelers safety Troy Polamalu, left, breaks up a pass intended for Washington Redskins wide receiver Malcolm Kelly, right, during the first quarter of a preseason NFL football game in Landover, Md., Saturday, Aug. 22, 2009. (AP Photo/Susan Walsh)

Arizona Cardinals wide receiver Larry Fitzgerald (11) is tackled by Pittsburgh Steelers safety Troy Polamalu, left, and cornerback Ike Taylorthe after a reception during the fourth quarter of the NFL Super Bowl XLIII football game, Sunday, Feb. 1, 2009, in Tampa, Fla. (AP Photo/Mark Humphrey)

Pittsburgh Steelers safety Troy Polamalu celebrates following Pittsburgh's 27-23 win over the Arizona Cardinals in the NFL Super Bowl XLIII football game, Sunday, Feb. 1, 2009, in Tampa, Fla. (AP Photo/Amy Sancetta)

Pittsburgh Steelers safety Troy Polamalu (43) celebrates his 40-yard interception return for a touchdown in the fourth quarter of the NFL AFC championship football game against the Baltimore Ravens in Pittsburgh, Sunday, Jan. 18, 2009. (AP Photo/Rob Carr)

Pittsburgh Steelers safety Troy Polamalu (43) turns up field after intercepting a pass intended for New England Patriots tight end Benjamin Watson during third quarter of an NFL football game in Foxborough, Mass., Sunday, Nov. 30, 2008. (AP Photo/Stephan Savoia)

Pittsburgh Steelers safety Troy Polamalu, right, is grabbed by Cincinnati Bengals wide receiver T. J. Houshmendzadeh after intercepting a pass intended for Houshmendzadeh in the fourth quarter of the NFL football game in Pittsburgh, Thursday, Nov. 20, 2008. The Steelers won 27-10.(AP Photo/Keith Srakocic)

Pittsburgh Steelers safety Troy Polamalu intercepts a pass by San Diego Chargers quarterback Philip Rivers in the first half of an NFL football game in Pittsburgh, Sunday, Nov. 16, 2008. (AP Photo/Keith Srakocic)

Pittsburgh Steelers safety Troy Polamalu (43) runs back an interception as Arizona Cardinals's Jerheme Urban (85) defends during the second quarter of an NFL football game Sunday, Sept. 30, 2007 in Glendale, Ariz. (AP Photo/Matt York)

Pittsburgh Steelers' players Deshea Townsend, left, and Troy Polamalu celebrate their team's 21-10 victory over the Seattle Seahawks at the Super Bowl XL football game, Sunday, Feb. 5, 2006, in Detroit. (AP Photo/Mark J. Terrill)

Pittsburgh Steelers' Troy Polamalu (43) intercepts a first quarter pass by New York Jets quarterback Chad Pennington pass intended for Jets' Santana Moss (83) in NFL action Sunday, Dec. 12, 2004 at Pittsburgh. The inteception set up the only points of the first half, a Steelers field goal. (AP Photo/Gene J. Puskar)

Washington Redskins halfback Chris Cooley, left, catches a touchdown pass on fourth down in front of Pittsburgh Steelers safety Troy Polamalu in the third quarter in Pittsburgh on Sunday, Nov. 28, 2004. The Steelers won 16-7. (AP Photo/Keith Srakocic)

Southern California safety Troy Polamalu (43) outruns Penn State offensive tackle Imani Bell as he returns an interception for a touchdown during the second quarter of the Kickoff Classic at Giants Stadium in East Rutherford, N.J. Sunday, Aug. 27, 2000. (AP Photo/Daniel Hulshizer)