This Autographed You Can't Hit The Ball With The Bat On Your Shoulder Hard Cover Book has been Personally Signed by Bobby Bragan & Bobby Valentine. 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. Press Pass Collectibles only offers Authentic Autographs by Bobby Bragan & Bobby Valentine through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.