USA Basketball now has a full 12-man roster for the Tokyo Games, after Chicago’s Zach LaVine and Detroit’s Jerami Grant accepted invitations Wednesday to join the team that will try to win the program’s fourth consecutive Olympic gold medal. LaVine’s decision was confirmed by his agent, Nima Namakian. Grant’s decision was confirmed by a person familiar with the situation, who spoke to The Associated Press on condition of anonymity because USA Basketball has yet to formally reveal the full roster. The challenge for the Americans will be keeping the group together. There has already been one change; Brooklyn’s James Harden, who had briefly committed, has since told the national team that a hamstring injury that affected him during the NBA playoffs would not allow him to participate, the person familiar with the roster decisions told AP.