It's been confirmed that Leinster hooker Ronan Kelleher will be out of action for between four to six weeks.
Kelleher underwent a procedure on his ankle last week and will now miss Ireland's autumn international campaign.
Blues centre Robbie Henshaw is available for selection this weekend after returning to training last week from a 'minor injury'.
Lee Barron and Ryan Baird and Jordan Larmour require further assessment this week ahead of the URC trip to Connacht on Saturday.