Munster expect to be without prop BJ Botha for at least one month after he suffered a grade two tear of his medial ligament against London Irish last weekend.
Andrew Conway and James Downey will also not be available for this Saturday's game against Edinburgh.
Ivan Dineen returned to full training in CIT today as did Keith Earls, who took part in full contact training following on from his recovery from a shoulder injury.
LIVE: RABODIRECT PRO12
Live web-only coverage of Scarlets v Leinster from 19:02 on Friday 6 September on RTÉ.ie (Ireland only).