Custom on-field style jersey. Everything is sewn on, size XL. Hand-signed by Kenneth Walker.The lot / autograph(s) includes an official Beckett "Rookie Year" Authentication Services serially numbered hologram for authenticity purposes. Beckett defines their "Rookie Year" authentication as "A way to acknowledge autographs obtained before an athlete starts their second full season as a professional."Authentication: Beckett "Rookie Year" Hologram