A potentially season ending ankle injury for Tomas O'Leary marred Munster's tenth straight win in all competitions, which saw the Magners League leaders outscore the Scarlets by four tries to one at Musgrave Park.
Early indications are that scrum half Tomas O'Leary, one of eight Munster players included in the British & Irish Lions squad, has a suspected fractured ankle.
He was immediately ruled out of next weekend's Heineken Cup semi-final showdown with Leinster, while, depending on scan results, his chances of recovering for South Africa seem extremely slim.
In a Magners League context Munster move onto 58 points to make the title secure.
The reigning European champions had seven of their eight 2009 Lions on board, with tour captain Paul O'Connell the only absentee as he rested a sore hip.