Leaders St Mary's College will give a debut to scrum-half Cormac Quinn in a first versus second encounter with Blackrock College, who have been decimated by Magner's League and Ireland U19 commitments, at Templeville Road.

Former Leinster and Leicester Tiger hooker Gavin Hickie will start in the middle of the front row as St Mary's College go about maintaining their 100% start to the AIB League on the road to UL-Bohemian in round five on Saturday.

Blackrock College co-coaches Barry Gibney and Emmett Farrell bring in prop Sean Byrne to tight-head as their only change to the leaders' side to play Clontarf at Castle Avenue.

Cork Constitution will give an AIL debut to possible Ireland Under-20 second row Brian Hayes at home to UL-Bohemian at Temple Hill tomorrow.

Former Leicester Tigers hooker Gavin Hickie has returned to St Mary's College ahead of their season opener at home to Dublin rivals Clontarf at Templeville Road.