This Autographed Bobby Brown Oal Baseball has been Personally Signed by Notable Signatures Include: Mark McGwire, Tony La Russa, Jose Canseco, Goose Gossage, Dennis Eckersley, Willie Wilson, Dave McKay, Rickey Henderson, Jeff Parrett, Kevin Campbell, Carney Lansford, Terry Steinbach, Jerry Browne, Jim Corsi, Mike Moore, Randy Ready, Eric Fox, Mike Bordick, Art Kusnyer, Vince Horsman, Rick Honeycutt, Jeff Russell, Kelly Downs, Bob Welch, Walt Weiss, Dave Stewart, Jamie Quirk & 1 more. 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.