Scarlets have signed Argentina flanker Tomas Lezana from Australian side Western Force for next season.
Lezana, 27, has played 39 times for the Pumas since making his debut against France in 2014.
He had signed for Western Force for 2021 after previously playing for Jaguares in Super Rugby.
Flanker Jac Morgan is leaving Scarlets for Ospreys next season, while Josh Macleod and James Davies have long-term injuries.
"With Josh Macleod still recovering from his Achilles injury and James Davies also working his way back to fitness, we feel we needed to bolster our back-row resources ahead of next season and are looking forward to welcoming Tomas to Parc y Scarlets," said Scarlets general manager of rugby Jon Daniels.
"He is someone who will give us an extra carrying threat and he is renowned for his high defensive stats and work rate."
Lezana could face some of his new team-mates this summer, when Wales host the Pumas in back-to-back Tests on 10 and 17 July - with the two-match series switched from Argentina to the UK due to travel considerations.
He becomes Scarlets' second signing following the capture of tight-head prop WillGriff John from Sale Sharks.
Scarlets have also announced the re-signing of internationals Wyn Jones, Blade Thomson, Ryan Elias and Aaron Shingler as well as Carwyn Tuipulotu, Morgan Jones and Javan Sebastian.