Ospreys' Jonathan Thomas is the favourite to fill suspended flanker Andy Powell's boots for next weekend's RBS 6 Nations clash with France.
The 27-year-old started at lock in last-gasp 31-24 triumph over Scotland but is tipped to move to blind-side flanker as boss Warren Gatland attempts to re-build his injury-hit pack.
Thomas’ move will leave two vacancies in the second row due to Alun Wyn Jones’ championship–ending elbow injury sustained in the same game.
Front row trio Gareth Williams, Gethin Jenkins and Matthew Rees will all miss out through injury, with Scarlets’ hooker Ken Owens called into the squad.
"We're all aware of the impact Ken has for the Scarlets when he comes off the bench, and in the number of starts he's had in the season as well," said forwards coach Robin McBryde.
And Owens’ call-up has been backed by club coach Nigel Davies, who said: “Ken has been staking a strong claim for international honours this season, he is playing some superb rugby and he is playing it consistently.”
"We are pleased for him that he will have an opportunity to show what he is capable of at national level.”