Blue Bulls number eight Hanro Liebenberg will be sidelined for six weeks due to stomach surgery, but fellow back row Arno Botha has been cleared to play this weekend.
Liebenberg had to undergo surgery following a blow to his intestines and will only be back in six weeks, pending recovery, Blue Bulls team doctor Org Strauss confirmed.
Botha has been cleared following a knee injury picked up in Japan and can be considered for this weekend's match against ORC Griquas in Kimberley.
The likes of Dayan van der Westhuizen, Tian Schoeman, Dries Swanepoel, Warrick Gelant and Roelof Smit will only train on Tuesday, following niggling injuries sustained in the win over the Western Province last weekend.
Strauss also confirmed that Callie Visagie will not play again this season. The hooker will undergo foot surgery this week and will be out for four months at least.
Visagie will join Irne Herbst, Piet van Zyl, Morné Mellett and Dennis Visser on the long-term injury list.
Ruan Steenkamp and Pierre Schoeman, who are recovering from knee injuries, are pencilled in to return at the end of the month and Ryan Nell and Duncan Matthews on September 15.