Trevone Boykin Signed Texas Christian University Horned Frogs Jersey (JSA QR)Custom on field style jersey. Everything is sewn on, size XL. The jersey is hand signed and inscribed in silver paint pen by Trevone Boykin (Seahawks). The autograph includes an official James Spence Authentication (JSA) "Signature Debut" hologram. "Signature Debut" is the autographed memorabilia equivalent to a rookie card. The JSA definition of a "Signature Debut" is as follows: "Any item that is autographed and received by JSA prior to the last