Munster have named an unchanged side for Saturday's crucial Heineken Cup clash against Castres at Thomond Park.
Donncha O'Callaghan remains on an unchanged bench despite making a superb contribution as a replacement against Treviso last weekend.
Paul O'Connell's training has been curtailed this week because of a knee gash but he is named in the team.
Victory for unbeaten Munster could earn them a last-eight spot with a round of matches to spare.
If Munster win and Scarlets lose against Northampton or if Scarlets win without a bonus point, then Tony McGahan's side will be through to the quarter-finals.
Munster will face Northampton in the final Pool game in Milton Keynes next weekend.
Castres have won only one of their opening four pool games and are already out of contention for a place in the knockout stages.
Munster: D Hurley; J Murphy, K Earls, L Mafi, S Zebo; R O'Gara, C Murray; W du Preez, D Varley, BJ Botha; D Ryan, P O'Connell capt; P O'Mahony, N Ronan, J Coughlan.
Replacements: D Fogarty, M Horan, S Archer, Donncha O'Callaghan, B Holland, T O'Leary, I Keatley, D Barnes.
Castres: R Martial; V Inigo, P Bonnefond, PM Garcia, PG Lakafia; P Bernard,T Lacrampe; S Taumoepeau, MA Rallier, A Peikrishvili; M Rolland, R Capo Ortega; Y Caballero, S Malonga, J Bornman.
Replacements: M Bonello, M Coetzee, K Wihongi, S Murray, I Diarra, R Kockott, S Bai, M Nicolas.
