This Autographed Bobby Brown Oal Baseball has been Personally Signed by Don Mattingly, Pat Kelly, Alvaro Espinoza, Pat Sheridan, Hensley Meulens (2x), Rich Monteleone, Stump Merrill, Greg Cadaret, Graig Nettles, Dave Eiland, Jeff Johnson, John Habyan, Randy Velarde, Kevin Maas, Andy Hawkins, Scott Kamieniecki, Lee Guetterman, Tim Leary, Bob Geren, Wade Taylor, Steve Howe, Frank Howard, Scott Sanderson, Jim Leyritz, Steve Farr and Pascual Perez of the New York Yankees. 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.