This Autographed 1989 World Series Baseball has been Personally Signed by Tony LaRussa; Dave Parker; Dennis Eckersley; Mark McGwire; Matt Young; Jim Corsi; Ken Phelps; Rick Honeycutt; Carney; Lansford; Rene Lacheman; Stan Javier; Curt Young; Dave Duncan; Mike Moore; Ron Hassey; Art Kusnyer; Make Gallego; Storm Davis; and five others of the Oakland Athletics. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.