Steelers, Polamalu agree to 5-year contract extensionMonday, July 23, 2007By Ed Bouchette, Pittsburgh Post-Gazette(Published: 3:40 p.m., updated 3:51 p.m.)The Steelers agreed to a contract extension today with safety Troy Polamalu, assuring one of their best players will remain in Pittsburgh for a while longer.Polamalu signed a five-year contract worth $33 million, making him the highest-paid Steeler and highest-paid safety in the NFL. He will receive bonuses -- including signing and roster -- of $15,375,000.Polamalu, who has made every Pro Bowl since he became the Steelers starting strong safety in 2004, had one year left on the contract he signed as a rookie in 2003.At 5-10, 207 pounds, Polamalu plays a unique brand of safety, lining up in various positions on defense. Coordinator **** LeBeau has designed many of his defenses to take advantage of Polamalu's ability.