Props Moray Low (Glasgow Warriors) and Ed Kalman (Border Reivers) were called-up to today's Scotland training session at Murrayfield.
The pair were enlisted as cover for Allan Jacobsen (Edinburgh Rugby) and Gavin Kerr (Border Reivers) who were injured during Heineken Cup action at the weekend.
Jacobsen suffered a cut to his lower leg in Edinburgh's game against Leinster, while Kerr retired with a thigh strain from Borders' match against Northampton.
Andrew Hall (Newport Gwent Dragons) was also added to the squad to provide back-row cover. Scotland team doctor James Robson explained: "A number of our players had bumps and bruises from matches at the weekend so as part of our player welfare protocol some players are not participating in every training session during our camp this week."
Flanker Donnie Macfadyen (Glasgow Warriors) trained this morning but was rested from this afternoon's practice.
In the backs Edinburgh Rugby centre Marcus Di Rollo (neck strain) has not trained. Scrum-half Chris Cusiter, who underwent shoulder surgery after being injured in Novemberâ€™s Bank of Scotland Corporate Autumn Test against the Pacific Islanders, has taken part in most of the training.