Blake Griffin won the 2010-2011 NBA Rookie of the Year as well as the NBA Slam Dunk Contest. Now with Chris Paul, Griffin is helping turn around a Clippers team which has struggled in years past. Griffin is one of the most exciting stars in the league and is a fan favorite for his incredible slam dunks. Griffin personally hand-signed this Spalding NBA I/O basketball. It includes a Panini Authentics Certificate of Authenticity.