The Bulls have suffered a blow ahead of Saturday's game against the Crusaders after Hanro Liebenberg pulled up with a hamstring strain in captain's practice.
Liebenberg had been named to start at No 8, but the Bulls confirmed on Friday that Renaldo Bothma would now take his place.
The Bulls will be aiming for a third consecutive win on Saturday, but the undefeated Crusaders are heavy favourites to complete a 10th win of the season.
Bulls – 15 Warrick Gelant, 14 Travis Ismaiel, 13 Jesse Kriel, 12 Burger Odendaal, 11 Jamba Ulengo, 10 Tian Schoeman, 9 Piet van Zyl, 8 Renaldo Bothma, 7 Jacques Potgieter, 6 Nick de Jager, 5 Lood de Jager, 4 Jason Jenkins, 3 Trevor Nyakane, 2 Adriaan Strauss (c), 1 Pierre Schoeman.
Subs: 16 Jaco Visagie, 17 Lizo Gqoboka, 18 Jacobie Adriaanse, 19 RG Snyman, 20 Jannes Kirsten, 21 Rudy Paige, 22 Francois Brummer, 23 Jan Serfontein.
Photo: Anton Geyser/Gallo Images