Kristaps Porzingis Autographed Boston Celtics Green Basketball Jersey JSA COA Green basketball jersey autographed by Kristaps Porzingis - authenticated by James Spence Authentication (JSA)Proven to be one of the best acquisitions of the off-season, Kristaps Porzingis has given the Boston Celtics a much needed boosted in the front court showing phenomenal offensive and defensive attributes game in and game out. This Boston Celtics jersey has been hand signed by the Celtics star. The jersey is authenticated by JSA & will include the JSA card and hologram.Hand signed by Kristaps PorzingisSignature is bold and clear on the jerseyAuthenticated by James Spence Authentication (JSA)Stock image - customer will receive similar item