Relegation-threatened Leeds Tykes have agreed to release Wales number eight Alix Popham at the end of the season.
The 25-year-old former Newport back-row man will join the Llanelli Scarlets squad in time for pre-season training.
"I'm excited about joining the set-up at the Scarlets and playing in Europe next season. It's a great team and I'm proud to be joining it," said Popham.
The player won the last of his 10 Wales caps against Japan in the November internationals.
He has been training with Wales' Six Nations squad this season, but has failed to make the starting XV or win a place among the replacements.
"He is a versatile back row player and will further strengthen our squad," said Scarlets chief executive Stuart Gallacher.
"This is good news for the Scarlets, we're delighted to bring him back into Welsh rugby."
The signing will boost the Scarlets, with injuries having forced the retirement of Wales and Lions number eight Scott Quinnell.
Leeds are in a desperate position in the Zurich Premiership, four points adrift at the foot of the table with just three games to go.
Tykes and Wales back-row man Richard Parks has also been linked with a move to the Scarlets, whilst Leeds coach Phil Davies is thought to be interested in a return to Wales.