Blue Bulls flanker Deon Stegmann will miss the next four weeks of the Currie Cup after he fractured his cheekbone against Griquas on Friday.
The openside flanker came from the field in the 52nd minute of the match.
William Small-Smith, who left the action after a blow to the head, will have a fitness test on Thursday to determine if he will be available for the clash against Western Province on Saturday.
Francois Hougaard, who injured a thumb ligament, will also be given time until Thursday to prove his fitness, team doctor Org Strauss confirmed.
Lock Jacques du Plessis, who has a back spasm, will be back on the training field on Tuesday.
Flanker Arno Botha will be back in two weeks following his medial menisectomy.