Jim Kelly and Thurman Thomas have both signed this authentic official NFL football. This football comes complete with the patented Steiner Sports certificate of authenticity as well as the tamper proof hologram. The Steiner Seal Means It's Real. Officially licensed by the NFL If for any reason you are not completely satisfied with the quality or authenticity of your purchase, we will gladly give you a full refund or exchange, whichever you prefer up to 30 days after purchase. Authenticator : Steiner Sports Authenticated History of item : Jim Kelly and Thurman Thomas have signed this item in the presence of a representative from Steiner Sports.