Scarlets prop Samson Lee will miss the start of the 2016/17 Pro12 season after undergoing shoulder surgery.
Lee featured for Wales in all three Tests in the recent series defeat against world champions New Zealand, but the tighthead went under the knife on Friday and could be out until October.
Scarlets head physio Matthew Rees said: "Samson has undergone shoulder surgery and is expected to be unavailable for 12-16 weeks."
There was more positive news of DTH van der Merwe, Emyr Phillips and Gareth Owen, who are all set to be fit when the Pro12 season gets under way in September.
"We're pleased to see DTH, Emyr and Gareth making good progress and on track to be back in action for the start of the season," Rees added.