This Autographed Auto Grade Gem Mint 10! 1997 Donruss #36 Card with the inscription of "355 W's, 4x Cy & HOF 2014" has been Personally Signed by Greg Maddux of the Chicago Cubs. This item is 100% Authentic, it comes slabbed and authenticated by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.