Scarlets backrower Josh Turnbull has joined the Welsh Sevens squad in San Diego.
Wales are looking to build on last weekend's success after reaching the quarter-finals of the Wellington leg of the IRB Sevens series.
For the first time in history, Wales came away from a tournament having lowered the colours of two of the three best teams in the world. Both New Zealand and Fiji were on the receiving end of defeats as Wales proved they are a force to be reckoned with in the abbreviated version of the game.
This weekend a different looking Welsh squad takes part in the American leg in San Diego where they will face Fiji, Argentina and Mexico in Pool D.
Of the Wales squad that competed in Wellington, Aled Brew, Aled Thomas and Dafydd Hewitt have traveled home to be replaced by Josh Turnbull, Jimmy Norris and Chris Czekaj, who makes his first foray into international rugby since suffering a horrific leg injury in June 2007.
Team manager Dai Jenkins has no doubt that last weekend's Welsh performance will take some beating.
"That was the best ever performance by Wales. We have never beaten two of the best three teams in the world in the same tournament before - the boys played really well," he said.
"We've had some good boys come out and join the squad. We need continuity and this weekend is a huge challenge. We've just got to play the patterns consistently and hopefully the rewards will come. It's a big ask for the group.
"We'd like to get to the quarter-finals again and from there anything can happen. But we need to be reaching the top eight on a regular basis.
"There is hardly anything between the top 10 sides in this competition. Everyone of those top teams can beat the other in any given moment. Even the fourth teams, usually considered the weakest in the group, have the ability to beat those seeded above them so you've always got to be on top of your game."
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.