The programme this weekend will afford the opportunity to players like Malcolm O'Kelly and Eric Miller take their place for their respective clubs. O'Kelly hasn't played since injuring a cheekbone and eye-socket while playing for Leinster against Newcastle in a European Cup match at the start of January. If he comes through the match with Garryowen unscathed then he is likely to be named in the Ireland team to face England in the Six Nations Championship match at Twickenham tomorrow week. Keith Gleeson is also expected to make his debut for the Templeville Road club who could also have players such as Victor Costello, Peter McKenna, Peter Coyle and Gavin Hickie available for this match.
For their part, Garryowen will be without international David Wallace but Jeremy Staunton may be involved following an ankle injury while Dominic Crotty, Killian Keane, Tom Tierney and Paul Neville are all available.
Leaders Cork Constitution will be without John Kelly, Anthony Horgan, Brian O'Meara and Mick O'Driscoll through injury. Frankie Sheahan is rested but Cian Mahony and Jerry Murray are expected to be available.
Eric Miller has been named in the Terenure team to play Blackrock at Lakelands having recovered from the stomach bug that forced him to miss last Saturday's game against Wales. Miller is selected at blindside flanker but could play number eight.
Blackrock will be without injured trio, Gavin McCarthy, Richie Woods and Niall Treston. Paul Wallace will start as will Willis while the bench could include Leo Cullen, Shane Byrne and Bob Casey.
St Mary's College: P McKenna; J Norton, K Lewis, G Gannon, J McWeeney; M McHugh, C McPhillips; P Coyle, G Hickie, D Clare; E Keane, M O'Kelly; M O'Shaughnessy, V Costello, AN Other.
Blackrock College: N Turner; M Jackson, G Brown, D Quinlan, C Kilroy; J Corry, B Willis; N Fox, G McEvoy, P Wallace; T Hogan, J Fitzgerald; D O'Brien, D McGettigan, R Rogers.
Terenure College: S Cullen; P Costello, D McEnerney, JB Sullivan, S King; R Governey, K Putt; S Barretto, C Egan, J Nolan; M Quinn, D Quinn; E Miller, D Blaney, P O'Malley.
Division two. Ballynahinch v Old Belvedere: Barnhall v City of Derry: Malone v Bective Rangers: Portadown v Old Crescent: Sunday's Well v Midleton: Thomond v Dolphin: UCC v Belfast Harlequins: UL Bohemians v Wanderers.
Division Three. Ballina v Naas: Connemara v Waterpark: Dublin University v Cllonakilty: Instonians v Greystones: Old Wesley v Corinthians: Richmond v Monkstown: Skerries v Banbridge: Suttonians v Bangor.