Club co-captain Fraser Brown is expected to be out of action for at least three months as the hooker recovers from a neck injury sustained playing for Scotland in the Autumn Nations Cup match against Ireland.
George Horne is to undergo surgery on a foot injury in the coming weeks. The Glasgow Warriors and Scotland scrum-half sustained the injury while in Scotland camp and is expected to be sidelined for up to 12 weeks.
Meanwhile, Alex Allan has successfully undergone surgery at BMI Ross Hall Hospital on an Achilles injury sustained while playing against Dragons in early December. The prop is expected to be unavailable for the remainder of the season.