The Giannis Antetokounmpo Signed Bucks Nike Vaporknit NBA Authentic Jersey is a highly sought-after collector's item for fans of the Milwaukee Bucks and basketball enthusiasts. This original jersey, signed by the player himself, comes with authentication from James Spence (JSA) to verify the legitimacy of the autograph. It is a valuable piece of memorabilia for fans looking to own a piece of NBA history. Listed With Mascot.