Sheffield have signed Hull KR trialist Nabil Djalout on a one-year deal.
Djalout, 28, played for the Robins in their friendlies against Hull and York and was offered a deal by Catalans, but turned it down.
Primarily a back-rower, he played for France at the World Cup, featuring at centre against Lebanon and England.
Eagles coach Mark Aston said: “I’m pleased we’ve been able to bring Nabil into the squad. He’s a competitor, he’s tough, aggressive and dynamic.
“He’s only had one session with us, but he understands the game well and ran some very good lines.
“At 28 he might seem a bit of a late bloomer but he’s been in a good system at Catalan and caught the eye of Hull KR so he’s a high quality player.
“He turned down a good deal with the Dragons as he wants a crack in England and as he can provide options in the back row and centre, he will be a valuable asset to us.”