Juarno Augustus suffered a significant ankle ligament injury in Saturday's URC victory against Connacht and as a result will now be sidelined for a number of weeks.
Ethan McIlroy sustained a rib injury playing for Ballynahinch RFC in their Bank of Ireland Senior Cup Final victory over Instonians RFC and he too is currently unavailable for selection.
Eric O'Sullivan (hamstring), Matthew Dalton (knee), Iain Henderson (back) and Rob Herring (knee) have all resumed team training and their availability for selection will be assessed through training this week.