Wales have called up four players to train with the national squad following their bruising defeat to South Africa on Saturday.
Scarlets props Samson Lee and Rhodri Jones, plus Dragons backs Hallam Amos and Tom Prydie will provide cover after the Six Nations champions lost a four players to injury by half-time by the 24-15 loss at the Millennium Stadium.
The squad will meet up on Monday to prepare for their second November Test against Argentina in Cardiff.
Centre Jonathan Davies has been ruled out of the November series due to a pectoral muscle injury.
Tighthead prop Adam Jones suffered a calf strain while his replacement Scott Andrews hurt his neck. Wing Liam Williams took a blow to the head in the build-up to South Africa's first try.
Lee played for Wales U20 during the 2012 Six Nations Championship and in the IRB Junior World Championship in South Africa in the same year. He has played seven times for the Scarlets this season.
21-year-old Jones made his debut for Wales against the Barbarians in June 2012 and earned his second cap a year later on the summer tour to Japan.
Uncapped 19-year-old Dragons back Amos has scored two tries in his eight outings for the region this season and has made 26 appearances since making his debut for the Dragons aged 17.
Prydie became the youngest player to play for Wales when he made his debut in the 2010 Six Nations against Italy aged 18 years and 25 days. He has gone on to make five appearances for Wales, earning his last cap on the summer tour to Japan.
Ospreys wing Eli Walker (hamstring) and Cardiff Blues fly-half Rhys Patchell (shoulder) have returned to their regions for further treatment.