Karl Mecklenburg Autographed Denver Broncos Logo Football- Beckett W Auth *Black This is a Karl Mecklenburg of the Denver Broncos hand autographed logo football. This item has a Beckett Witnessed Authentication, which comes with a Beckett numbered sticker and a matching Beckett Certificate of Authenticity. You can view this item on the Beckett Authentication website. It was signed either at a public autograph appearance or a private signing. This is a stock photo of the item. Although you may not receive this exact item, the item you receive is virtually identical, brand new, and in great shape.