Riddell SUPER BOWL LVII LOGO Speed Mini Helmet hand signed by Kansas City Chiefs Super Bowl Champ MARQUEZ VALDES-SCANTLING. The signature is in Black Sharpie. This Item was signed at a private signing and would make a great addition to any Chiefs collection! This item is guaranteed to be 100% authentic and will include a COA from Waukesha Sportscards with matching serial numbered holograms.