With a number of international players unavailable for selection, Anthony Foley has rung the changes for Saturday's GUINNESS PRO12 clash with Cardiff Blues. Donncha O'Callaghan, Munster's most-capped player, will captain the province in the Welsh capital.
Ulster head coach Neil Doak has made seven changes and two positional switches to the team that lost to Toulon for Saturday's GUINNESS PRO12 game against the Newport Gwent Dragons at Kingspan Stadium (kick-off 7.35pm).
Dove Men+Care have teamed up with Ireland internationals Cian Healy and Luke Fitzgerald, along with a host of players from the other home Unions, to launch an emotive video ahead of a huge 12 months of international rugby.
The big games keep coming in Ulster Bank League Division 1A, with Terenure hosting Clontarf in a top of the table clash and Lansdowne and UCD - sitting third and fourth respectively - also taking each other on.
Like the top flight, Ulster Bank League Division 1B also has its own meeting of the top two this weekend as front runners Galwegians host Ballymena. The action gets underway tonight with the Buccaneers v Corinthians Connacht derby under floodlights.
Connacht have struggled to get results against the Ospreys, with just one win since the 2007/08 season, so a maiden victory at the Liberty Stadium would give Pat Lam's men a big lift ahead of the international break.
The Ireland squad are in camp at Carton House this week as they prepare for the GUINNESS Series opener against South Africa. There are a number of players carrying injuries in the build up to the sold-out game.