Full back Rhys Williams is likely to miss the Blues' next three games after an x-ray and scan have confirmed a shin injury.
The injury was sustained in the second half of last week's match against Stade Francais Paris.
Craig Morgan looks set to wear the number 15 shirt in this weekend's final Heineken Cup pool game against Ulster. The team will be announced on Friday with, apart from Williams, the same 21 players who travelled to Paris plus Lee Thomas who has recovered from a shoulder injury. Craig Quinnell and Ryan Powell will not be fit for selection.