| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 21-Sep-2012 | Robbie Henshaw | Ireland | 12-Jun-1993 | 19(101) |
| 27-Oct-2012 | Darragh Leader | Ireland | 22-May-1993 | 19(158) |
| 01-Sep-2012 | Kieran Marmion | Ireland | 11-Feb-1992 | 20(203) |
| 15-Sep-2012 | Eoin McKeown | Ireland | 23-Jun-1991 | 21(85) |
| 01-Sep-2012 | Tiernan O'Halloran | Ireland | 26-Feb-1991 | 21(188) |
| 23-Nov-2012 | Michael Kearney | Ireland | 29-Mar-1991 | 21(240) |
| 01-Sep-2012 | Eoin Griffin | Ireland | 18-Sep-1990 | 21(349) |
| 01-Sep-2012 | Dennis Buckley | Ireland | 09-Aug-1990 | 22(24) |
| 21-Sep-2012 | Matthew Jarvis | Wales | 25-Aug-1990 | 22(28) |
| 15-Sep-2012 | David McSharry | Ireland | 10-Feb-1990 | 22(218) |
| 21-Sep-2012 | James Loxton | Wales | 02-Feb-1990 | 22(232) |
| 03-Nov-2012 | Danie Poolman | South Africa | 10-Mar-1989 | 23(238) |
| 29-Dec-2012 | Matthew Healy | Ireland | 14-Mar-1989 | 23(290) |
| 01-Sep-2012 | Mata Fafita | Tonga | 18-Aug-1988 | 24(14) |
| 27-Oct-2012 | Jason Harris Wright | Ireland | 19-Sep-1988 | 24(38) |
| 21-Sep-2012 | Mark McCrea | Ireland | 07-Sep-1987 | 25(15) |
| 08-Feb-2013 | Kyle Tonetti | Ireland | 08-Oct-1987 | 25(124) |
| 15-Sep-2012 | Andrew Browne | Ireland | 21-Jan-1987 | 25(238) |
| 15-Sep-2012 | Willie Faloon | Ireland | 30-Sep-1986 | 25(351) |
| 22-Feb-2013 | Brian Murphy | Ireland | 06-Dec-1985 | 27(78) |
| 01-Sep-2012 | Miah Nikora | New Zealand | 28-Apr-1985 | 27(126) |
| 01-Sep-2012 | Fetu'u Vainikolo | Tonga | 30-Jan-1985 | 27(214) |
| 01-Sep-2012 | Ronan Loughney | Ireland | 01-Nov-1984 | 27(304) |
| 15-Sep-2012 | Brett Wilkinson | South Africa | 29-Nov-1983 | 28(291) |
| 01-Sep-2012 | George Naoupu | New Zealand | 04-Sep-1983 | 28(363) |
| 21-Sep-2012 | Dave Gannon | Ireland | 11-Feb-1983 | 29(223) |
| 01-Sep-2012 | John Muldoon | Ireland | 30-Nov-1982 | 29(276) |
| 01-Sep-2012 | Ethienne Reynecke | South Africa | 20-Mar-1982 | 30(166) |
| 01-Sep-2012 | Mike McCarthy | Ireland | 27-Nov-1981 | 30(279) |
| 01-Sep-2012 | Gavin Duffy | Ireland | 18-Sep-1981 | 30(349) |
| 15-Sep-2012 | Nathan White | Ireland | 04-Sep-1981 | 31(12) |
| 01-Sep-2012 | Johnny O'Connor | Ireland | 09-Feb-1980 | 32(205) |
| 21-Sep-2012 | Adrian Flavin | Ireland | 06-Jun-1979 | 33(108) |
| 28-Sep-2012 | Dan Parks | Scotland | 26-May-1978 | 34(126) |
| 01-Sep-2012 | Michael Swift | Ireland | 18-Oct-1977 | 34(319) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).