Troy Polamalu autograph (auto) - this is where to find them including his rare and low serial numbered autographed insert cards from different years and brands including Score Inscriptions autographs. Troy Polamalu autographs are rare to say the least; there just are not many of these cards out there as the ones I see are all serial numbered to varying low amounts. One of the cards I see listed for you right now is - Troy Polamalu 2010 Certified Mirror Gold Signatures Autograph serial numbered to 25 cards. Please find more below.