Jay-Z founded his sports agency this year and has already made aggressive moves in the sports world. In a few months he has managed to develop a strong client list of powerful athletes. Jay-Z became a certified sports agent in June, 2013. Take a look at the star power in the Roc Nation Sports client list featuring Skylar Diggins of the Notre Dame, Robinson Cano of the New York Yankees, Kevin Durant of the Oklahoma City Thunder, Quarterback Geno Smith of the New York Jets, Victor Cruz of the New York Giants and more powerful athletes to come.