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.