Stegmann, the Bulls captain, received a red card for striking a player with his elbow at a ruck in the 69th minute, which was in breach of Law 10.4 (a), while Mbonambi received a yellow card in the 12th minute for charging into a ruck dangerously, which contravened Law 10.4 (h).
The players will appear at a SARU disciplinary hearing in Pretoria on Tuesday at 16:00. Advocate Tokkie van Zyl has been appointed the judicial officer.
Western Province Under-21 flyhalf Robert du Preez and Golden Lions replacement lock Ramone Samuels were also cited following their Absa Under-21 Competition clash at Ellis Park on Saturday. Both players received yellow cards during the match.
Du Preez was cited for lifting a player in a tackle and dropping him the ground, which was in breach of Law 10.4 (j), while Samuels was cited for striking a player with his arm and shoulder on the ground without the ball, which contravened Law 10.4 (a).
Du Preez’s hearing will take place in Cape Town on Tuesday at 12:00, with Advocate Donny Jacobs serving as the judicial officer, while Samuels’ hearing will precede Stegmann and Mbonambi’s hearing in Pretoria at 15:30.