Max Williamson and Jamie Drummond have returned from their short-term loan to London Scottish and have re-joined the squad ahead of this weekend's Round Two match.
Sam Johnson and Jack Dempsey have successfully returned to full training this week following their recovery from their respective injuries.
Ryan Wilson sustained a knee injury in the closing stages of Saturday's win over Bath, and is undergoing further assessment by the club's medical team.
Jack Mann is working through the return to play protocols, after sustaining a head injury against Bath on Saturday.
Zander Fagerson has undergone a scan on a hamstring injury sustained against Zebre Parma, and is expected to be out of action for the foreseeable pending ongoing assessment.
Oli Kebble has begun his rehabilitation after picking up a shoulder injury against Zebre Parma, overseen by the club's medical team.
Cole Forbes (neck), Alex Samuel (back), Scott Cummings (foot), Enrique Pieretto (chest), Allan Dell (calf), Tom Gordon (calf) and Rory Darge (ankle) all continue their rehabilitation on their respective injuries.