Newly licensed as an agent for NBA and MLB players, Jay-Z and his Roc Nation Sports agency have officially announced the signing of one of the most marketable names in the NBA -- Oklahoma City Thunder forward Kevin Durant. The three-time All-Star tweeted an image yesterday afternoon showing him signing the papers with Jay-Z, adding "Grateful for this opportunity with Roc Nation Sports. It's go time." Durant, who's signed to the Thunder through the 2015 - 2016 season, is the latest high-profile addition to Jay-Z's roster of athletes, which includes the New York Yankees' Robinson Cano, the New York Giants' Victor Cruz, the New York Jets' Geno Smith, and WNBA rookie Skylar Diggins. Speaking about Durant's signing, Jay-Z observed, "He has a 90.5 free throw shooting rate, the youngest player in NBA history to join the 50-40-90 club. A giving individual and a legend in the making. What more can I say?"