Sergio Romo looked over his shoulder again and again as if he just wanted to make sure that the No. 54 Dodgers jersey was still there. It was, representing a confirmation of something Romo had come to believe would never happen. ''Honestly, kind of sheer irony isn't it?'' Romo said Thursday, the day after signing a one-year, $3 million contract that includes $250,000 in performance bonuses.