San Francisco 49ers Christian McCaffrey Autographed Pro Style Jersey BAS Authenticated. Tennzone Sports Memorabilia is dedicated in providing our customers with only 100% Authentic hand-signed sports memorabilia.You have our complete assurance that every hand-signed sports memorabilia we offer is 100% genuine and are personally hand-signed by the athlete or athletes themselves. How do we know this? We or one of our representatives attend and witness every signing. Our Authenticity Guarantee will give you the peace of mind you seek in this industry where 50% - 98% of the hand-signed items being offered are fraudulent. We want your shopping experience with us, to run as smooth as possible.