Division One newcomers Belfast Harlequins maintained their 100% record with a 17-0 win over Blackrock in Deramore Park while Ballymena also kept their unbeaten record winning 12-8 against Lansdowne in Dublin and Buccaneers saw off the Co Carlow challenge on a 23-15 final scoreline.
In Lakelands, a late Dermot O'Sullivan try, converted by Killian Keane saw Garryowen edge out a youthful Terenure side, 22-15.
Elsewhere, there were wins for Clontarf (46-29) over U.C.D. and Dungannon, 26-20, at home to Ul Bohs.
Results. - Division Two: - Barnhall 3-13 Dolphin.D.L.S.P. 10-29 Young Munster.Dublin University 7-13 Midleton.Greystones 23-45 Old Crescent.Portadown 11-18 Old Belvedere.Sunday's Well 6-20 Bective Rangers.Thomond 15-22 Malone. U.C.C. 16-8 Ballynahinch.
Division Three: - City of Derry 13-13 Suttonians.