Second rows James Ryan and Ryan Baird have been ruled out of Ireland's final Six Nations clash with Scotland at the Aviva Stadium on Saturday.
Their fellow Leinster locks Ross Molony and Joe McCarthy have been called in to train with Andy Farrell's squad as Ireland chase a first Triple Crown triumph since 2018.
Ryan came out much the worse in a second minute clash of heads with England's Charlie Ewels in Ireland's victory at Twickenham last Saturday and has returned to his province to be guided through the return to play protocols, but Ireland's pack leader may be stood down for a few weeks after failing his HIA at the weekend.
