The former Manly back scored a try in his solitary NRL appearance last season, and secured a release from the final year of his deal at the Roosters, who have recently announced the re-signing of Italy international full-back Anthony Minichiello.
Catalan coach Laurent Frayssinous said: “The signing of Michael is a great news for the club. He is a young and fast player and his pace will be a great value in our backline next season. We lacked of pace in the past seasons and the addition of this player will allow us to fill this gap.”
Oldfield won the NRL title in 2011 with Manly and in 2013 with the Roosters, and played in the Sea Eagles’ World Club Challenge loss to Leeds in 2012.