Bryan Habana and Ryan Kankowski will join Cecil Afrika, Kyle Brown and Branco du Preez in South Africa's squad for the Las Vegas and Vancouver 7s.
Kankowski will be available for selection in Vancouver.
Coach Neil Powell is also boosted by the return of regular captain Kyle Brown.
Cecil Afrika, Branco du Preez, Justin Geduld and the versatile R-uhan Nel also return as part of the team=s rotational policy.
South Africa is pooled with Canada, Wales and USA in Pool D.
Meanwhile, Fiji will take on Samoa at 1.19pm this Saturday in their first pool match.
They will then play France at 4.20pm Saturday.
Their last pool game is against Argentina at 8.38am Sunday.
The Cup Quarter Finals will start at 1.31pm Sunday. The semifinals kick off at 8.50am Monday while the Cup Final will kick off at 11.57am next Monday.
South Africa squad:
Chris Dry, Dylan Sage, Tim Agaba, Kwagga Smith, Bryan Habana, Kyle Brown (captain), Branco du Preez, Rosko Specman, Justin Geduld, Cecil Afrika, Seabelo Senatla, Ruhan Nel, Ryan Kankowski.
