Manny Acta has been fired as manager of the Washington Nationals, he told ESPNdeportes.com's Enrique Rojas on Sunday. Bench coach Jim Riggleman will be Washington's new manager. Riggleman has managed the Padres, Cubs and Mariners. Mike Rizzo, the Nationals' acting GM, confirmed Acta's firing Monday morning in an e-mail to The Associated Press.