Featured is a Troy Polamalu signed Pittsburgh Steelers black Nike on field football jersey. This jersey was hand signed by Troy Polamalu in the presence of a JSA authentication representative. Included with the jersey is a JSA witnessed hologram and certificate of authentication. This jersey would make a great addition to any sports memorabilia collection.. SPECIFICATIONS Autographed By: Troy Polamalu Team: Pittsburgh Steelers Sport: Football Authentication: James Spence Authentication (JSA)