Paul Pierce Boston Celtics Autographed Basketball Jersey - JSA Authenticated Pro-style basketball jersey signed by Celtics legend Paul Pierce; authenticated by James Spence Authentication (JSA) This basketball jersey has been hand-signed by Celtics basketball legend Paul Pierce. It has been authenticated by JSA. Hand-Signed by Celtics basketball legend Paul PierceSignature is bold and clear on the jerseyPro-style basketball jerseyAuthenticated by JSA