DK Metcalf Seattle Seahawks Autographed Jersey Signed football jersey from Seattle Seahawks star DK Metcalf - authenticated by James Spence Authentication (JSA) This pro-style football jersey has been hand-signed by Seattle Seahawks star DK Metcalf. All autographed memorabilia includes a certificate of authenticity and matching hologram. Hand-Signed by Seattle Seahawks star DK Metcalf Signature is bold and clear on the jersey Authenticated with JSA serially numbered certificate of authenticity and matching hologram