Jacob Stockdale suffered a rib injury in Friday's URC victory over Munster.
He joins the following on the list of injured players who are unavailable for selection this week: Juarno Augustus (ankle), Charlie Irvine (calf), Michael Lowry (ankle), Rory McGuire (ankle), Ethan McIlroy (ribs), James McNabney (knee), Stewart Moore (hand)
Ben Moxham has now reintegrated into full team training following his ACL knee injury and is available for selection.