Bill signed this basketball for our team during a private event during his induction into the Basketball Hall of Fame. He used a black sharpie to sign the basketball and inscribed the basketball “BEWARE OF THE PHOG”. THIS ITEM COMES WITH A CERTIFICATE OF AUTHENTICITY (COA) FROM JAMES SPENCE AUTHENTICATION (JSA). JSA HAS GIVEN THEIR APPROVAL AND PROVIDED A CERTIFICATE WITH MATCHING HOLOGRAM ON THE BASKETBALL GUARANTEEING THIS BASKETBALL TO BE AUTHENTIC. JSA IS THE LEADER IN THIRD PARTY AUTHENTICATION. We guarantee every autograph we sell to pass your choice of a third party authenticator (PSA, JSA, SGC, Beckett, etc).