| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 31-Aug-2012 | Chris Farrell | Ireland | 16-Mar-1993 | 19(168) |
| 22-Feb-2013 | Conor Joyce | Ireland | 05-Jul-1993 | 19(232) |
| 08-Feb-2013 | Stuart Olding | Ireland | 11-Mar-1993 | 19(334) |
| 23-Nov-2012 | Peter Nelson | Canada | 05-Oct-1992 | 20(49) |
| 28-Sep-2012 | Iain Henderson | Ireland | 21-Feb-1992 | 20(220) |
| 31-Aug-2012 | Paddy Jackson | Ireland | 05-Jan-1992 | 20(239) |
| 31-Aug-2012 | Craig Gilroy | Ireland | 11-Mar-1991 | 21(174) |
| 31-Aug-2012 | Luke Marshall | Ireland | 03-Mar-1991 | 21(182) |
| 31-Aug-2012 | Michael Allen | Ireland | 28-Nov-1990 | 21(277) |
| 31-Aug-2012 | Michael Heaney | Ireland | 05-Nov-1990 | 21(300) |
| 31-Aug-2012 | Robert Herring | Ireland | 27-Apr-1990 | 22(127) |
| 02-Nov-2012 | Ricky Andrew | Ireland | 02-Dec-1989 | 22(336) |
| 31-Aug-2012 | Sean Doyle | Ireland | 29-Jun-1989 | 23(63) |
| 31-Aug-2012 | Tim Nanai Williams | Samoa | 12-Jun-1989 | 23(80) |
| 29-Dec-2012 | Adam Macklin | Ireland | 26-Jul-1989 | 23(156) |
| 02-Nov-2012 | Chris Cochrane | Ireland | 18-Dec-1988 | 23(319) |
| 08-Feb-2013 | Alistair Birch | Ireland | 13-Oct-1988 | 24(118) |
| 08-Sep-2012 | Niall O'Connor | Ireland | 07-Jul-1987 | 25(64) |
| 08-Sep-2012 | Darren Cave | Ireland | 05-Apr-1987 | 25(157) |
| 31-Aug-2012 | Callum Black | England | 25-Feb-1986 | 26(188) |
| 31-Aug-2012 | Robert Diack | Ireland | 12-Nov-1985 | 26(293) |
| 31-Aug-2012 | Jared Payne | Ireland | 13-Oct-1985 | 26(323) |
| 30-Mar-2013 | Richard Lutton | England | 26-Feb-1986 | 27(32) |
| 14-Sep-2012 | Stephen Ferris | Ireland | 02-Aug-1985 | 27(43) |
| 14-Sep-2012 | Paul Marshall | Ireland | 26-Jul-1985 | 27(50) |
| 29-Dec-2012 | Adam D'Arcy | Australia | 03-Oct-1985 | 27(87) |
| 28-Sep-2012 | Daniel Tuohy | Ireland | 18-Jun-1985 | 27(102) |
| 22-Feb-2013 | Neil Walsh | Ireland | 29-Jun-1985 | 27(238) |
| 14-Sep-2012 | Andrew Trimble | Ireland | 20-Oct-1984 | 27(329) |
| 28-Sep-2012 | Chris Henry | Ireland | 17-Oct-1984 | 27(346) |
| 31-Aug-2012 | Lewis Stevenson | Ireland | 01-Jun-1984 | 28(91) |
| 28-Sep-2012 | Tommy Bowe | Ireland | 22-Feb-1984 | 28(219) |
| 26-Oct-2012 | Rhian Pienaar | South Africa | 10-Mar-1984 | 28(230) |
| 08-Sep-2012 | Declan Fitzpatrick | Ireland | 12-Dec-1983 | 28(271) |
| 08-Sep-2012 | Michael McCormish | Ireland | 07-Dec-1983 | 28(276) |
| 31-Aug-2012 | John Afoa | New Zealand | 16-Oct-1983 | 28(320) |
| 28-Sep-2012 | Neil McComb | Ireland | 15-Jul-1983 | 29(76) |
| 30-Mar-2013 | Nick Williams | New Zealand | 02-Dec-1983 | 29(119) |
| 05-Oct-2012 | Rory Best | Ireland | 15-Aug-1982 | 30(52) |
| 02-Nov-2012 | Roger Wilson | Ireland | 21-Sep-1981 | 31(43) |
| 14-Sep-2012 | Tom Court | Ireland | 06-Nov-1980 | 31(313) |
| 31-Aug-2012 | Johan Muller | South Africa | 01-Jun-1980 | 32(91) |
| 14-Sep-2012 | Nigel Brady | Ireland | 09-Oct-1979 | 32(341) |
| 05-Oct-2012 | Paddy Wallace | Ireland | 27-Aug-1979 | 33(40) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).