This autographed Nike MLB style jersey has been personally hand-signed by Jack Clark of the St. Louis Cardinals. Clark added the inscriptions "4x All Star," "1180 RBI's," "340 HR's," "2x Silver Slugger" and his nickname " Ripper" along with his signature. This autograph is certified by James Spence Authentication (JSA). It comes with the numbered hologram and matching Certificate of Authenticity.