Similarly, up front, Mike McCarthy and Adrian Flavin are also nursing injuries from the weekend.
Centre Danie Poolman will train with the squad tomorrow ahead of Saturday's RaboDirect PRO12 game against the reigning champions Ospreys. The 23 year old South African returned from a week in Germany where he underwent intensive treatment on his hamstring.
Meanwhile, Andrew Browne, Gavin Duffy, Matt Healy, Mark McCrea, Paul O'Donohoe, Ethienne Reynecke and Kyle Tonetti still remain unavailable for selection due to injury.
Head Coach Eric Elwood expressed that "it's been a busy fortnight with two teams competing in Europe - Heineken and B&I Cup - and with this our ninth consecutive match weekend there is obviously a big demand on our squad and we are looking at some injuries. But it's back to Rabo duty this week, and we're very much looking forward to the Ospreys game. Over the years, we've had huge physical encounters with the Welsh side and we'll be expecting the same this weekend"