This autographed Louisville Slugger baseball bat has been personally hand-signed by Gary Sheffield. This autograph is certified by James Spence Authentication's (JSA) Witnessed Protection Program. That means that a JSA representative was present when this item was signed. It comes with the numbered hologram and matching Certificate of Authenticity. Gary Sheffield played with 8 teams from 1988 to 2009 including the Milwaukee Brewers, San Diego Padres, Florida Marlins, Los Angeles Dodgers, Atlanta Braves, New York Yankees, Detroit Tigers, and the New York Mets. At the start of the 2010 season, Sheffield ranked second among all active players in walks (1,475), third in runs (1,636), fourth in RBIs (1,676), fifth in hits (2,689) and home runs (509). Sheffield hit his 500th home run on April 17, 2009.