O’Callaghan the only change for Munster

Munster make just one change in personnel to their starting XV, from the one that started against Castres Olympique, for tomorrow's Heineken Cup clash with Northampton Saints (6pm).

Injury to Niall Ronan forces a reshuffle in the pack where Donncha O'Callaghan, Ronan's replacement after 14 minutes will partner skipper Paul O'Connell.

Donnacha Ryan moves from lock to blindside flanker while Peter O'Mahony, who started at six against Castres, takes over on the openside from Ronan.

Otherwise it's a case of as you were in the starting XV but on the bench there's a first time inclusion in a Heineken Cup match day squad for Dave O'Callaghan while the ever reliable Mick O'Driscoll, with 196 Munster caps under his belt, makes his first appearance of this Heineken campaign on the bench.

Meanwhile speculation continues about the inclusion of Tom Wood and Chris Ashton in the Saints team. Wood is understood to have injured a toe while Ashton is reported to have fallen out with his coach Jim Mallinder.

Ashton is set to jump ship at season's end and sign up with Saracens.

Munster: D Hurley; J Murphy, K Earls, L Mafi, S Zebo; R O'Gara, C Murray; W du Preez, D Varley, BJ Botha; Donncha O'Callaghan, P O'Connell capt; D Ryan, P O'Mahony, J Coughlan.

Replacements: D Fogarty, M Horan, S Archer, M O'Driscoll, Dave O'Callaghan, T O'Leary, I Keatley, D Barnes.