Carlos “El Pibe” Valderrama Signed Addidas Soccer Ball COA Proof Photo 1. This Carlos “El Pibe” Valderrama. Autographed Full Size #5 Soccer Ball has been personally hand-signed by Carlos “El Pibe” Valderrama. This item is guaranteed 100% authentic. Don’t let your chance to own a great piece of memorabilia get away. All of our memorabilia comes with a Certificate of Authenticity. All memorabilia is guaranteed to pass any third party authenticator. All orders come with free tracking when available.