Ospreys have signed 20-year-old prop Gareth Thomas ahead of the 2014-15 season.
Thomas, a Wales age-grade international, has been a Welsh Premiership regular for Carmarthen Quins and has played twice for Scarlets.
The loose-head prop has also appeared in the British and Irish Cup for Llanelli.
Ospreys have signed Thomas until the end of the 2016-17 season.
Thomas is the fifth newcomer to join the Swansea-based region for next season.
Lock Rynier Bernardo, centre Josh Matavesi, full-back Dan Evans and hooker Sam Parry have also joined ahead of the new term.