It has been a different kind of season for Tim Federowicz, who seemed to cement himself in the backup catcher role last season but has already been optioned to Triple-A twice this season. The Dodgers sent him down again Wednesday in favor of veteran catcher Miguel Olivo, who was hitting .390 with four home runs and 18 RBIs for Triple-A Albuquerque.Federowicz, who has been doing a lot of the catching with A.J. Ellis working his way back from knee surgery, has no one to blame but himself.