Spalding Basketball signed by Boston Celtics Legends. This ball has 11 signatures from the different Celtics Players. The ball is signed by the following notable players: (All 11 signatures have been authenticated by PSA/DNA) Kevin Mchale Bob Cousy Rick Pitino Tom Heinsohn Dave Cowens Jo Jo White Danny Ainge Dennis Johnson All 11 autographs on this basketball were authenticated by a team of experts at PSA/DNA and come with a Letter of Authenticity so you can rest assured you are purchasing the real deal. Don't miss your opportunity to own this one-of-a-kind basketball autographed by Boston Celtics All-Time Greats.