Injuries disrupt Ulster cup plans
The Ireland lock is also likely to miss the final Pool 4 game away to Castres the following week due to a troublesome calf injury which flared up again during last week’s bonus-point win over the Scarlets.
Coach Mark Anscombe is set to bring in Ireland blindside Iain Henderson to partner Lewis Stevenson in the second row, while Robbie Diack looks set to continue in the No 6 jersey in the back row alongside skipper Chris Henry and Nick Williams.