Rocks coach Adrian Birrell has made two changes to his squad for this week's knockout phase of Cricket South Africa's T20 challenge in Kimberly.
Birrell and his team are in the bio-secure bubble in Kimberly as they prepare for Wednesday's quarter-final clash against the Northern West Dragons at the Diamond Oval.
Former Proteas fast bowler Hardus Viljoen and batsman Stiaan van Zyl, both recently returned from international club duties, have been included in the Rocks squad.
Viljoen and Van Zyl were not part of Rocks team, who finished advanced through to the playoffs by finishing top of Group D, and will replace Ruan Terblanche and Achille Cloete, respectively.
Van Zyl played 12 Tests for the Proteas from 2014-2016, while Viljoen played only one Test for the Proteas against England at the Wanderers in January 2016
"Stiaan is a quality performer, he brings a left-hander to our set-up. It's not his preferred format in T20 but he is an experienced player and gives us that left-hand option on top," said Birrell.
"Hardus is a quality player too and we're glad that he is played around the world so we're delighted to have him back in the fold. We didn't take him in the qualifiers as we had a look at our depth but he now comes into the team. He lengthens our batting as he is a forceful batter at the end."
Pieter Malan (captain), Clyde Fortuin Janaman Malan, Siyabonga Mahima, Zakhele Qwabe, Hlomla Hanabe, Khanya Dilima, Stiaan van Zyl, Shaun von Berg, Imraan Manack, Hardus Viljoen, Ziyaad Abrahams, Ferisco Adams, Christiaan Jonker.