Ireland head coach Andy Farrell has called Ulster's Eric O'Sullivan up to his squad ahead of Sunday's Autumn Nations Cup game with Georgia.
The IRFU released an update ahead of this weekend's game at the Aviva Stadium with Johnny Sexton and Robbie Henshaw both still rehabbing their injuries.
Both players missed last Saturday's 18-7 defeat to England at Twickenham.
Ed Byrne, who also missed out on that game due to calf tightness, will continue his rehab this week, while O’Sullivan has joined the squad to provide additional cover.
John Ryan flagged an issue during the warm-up which was treated but flared up again during the second half, he is expected to be able to train fully this week.
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Andy Farrell's expected to make plenty of changes for the visit of Georgia with speculation that Leinster's Harry Byrne could be called up.
The uncapped 21-year-old is the younger brother of Ross, who started at out-half against England in the absence of the injured Sexton.
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