signed by all twenty-two members of the USA and World teams who competed in the Rising Stars Challenge on February 15th at the Spectrum Center in Charlotte, North Carolina, including Luka Doncic, Shai Gilgeous-Alexander, Jayson Tatum, Trae Young, Wes Unseld, Darvin Ham and others.. Sport: Basketball,Player: Shai Gilgeous-Alexander,Signed: Yes,Original/Reprint: Original,Autograph Authentication: Beckett Authentication Services (BAS),Product: Ball,Country of Origin: United States