| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 20-Apr-2012 | Brad Thorn | New Zealand | 03-Feb-1975 | 37(77) |
| 20-Apr-2012 | Leo Cullen | Ireland | 09-Jan-1978 | 34(102) |
| 20-Apr-2012 | Brian O'Driscoll | Ireland | 21-Jan-1979 | 33(90) |
| 20-Apr-2012 | Mike Ross | Ireland | 21-Dec-1979 | 32(121) |
| 13-Apr-2012 | Gordon D'Arcy | Ireland | 10-Feb-1980 | 32(63) |
| 13-Apr-2012 | Issac Boss | Ireland | 09-Apr-1980 | 32(4) |
| 05-May-2012 | Damien Browne | Ireland | 17-May-1980 | 31(353) |
| 05-May-2012 | Eion Redden | Ireland | 20-Nov-1980 | 31(167) |
| 13-Apr-2012 | Shane Jennings | Ireland | 08-Jul-1981 | 30(280) |
| 05-May-2012 | Nathan White | Ireland | 04-Sep-1981 | 30(244) |
| 13-Apr-2012 | Isikeli Nacewa | Fiji | 22-Jul-1982 | 29(266) |
| 20-Apr-2012 | Robert Kearney | Ireland | 26-Mar-1983 | 29(26) |
| 13-Apr-2012 | James Heaslip | Ireland | 15-Dec-1983 | 28(120) |
| 02-Sep-2011 | Matthew Berquist | New Zealand | 11-May-1983 | 28(114) |
| 05-May-2012 | Leo Auva'a | Ireland | 16-Aug-1984 | 27(262) |
| 05-May-2012 | Kevin McLaughlin | Ireland | 20-Sep-1984 | 27(227) |
| 02-Dec-2011 | Steven Sykes | South Africa | 05-Aug-1984 | 27(118) |
| 13-Apr-2012 | Hendrik van der Merwe | South Africa | 03-May-1985 | 26(346) |
| 20-Apr-2012 | Jonathan Sexton | Ireland | 11-Jul-1985 | 26(284) |
| 08-Oct-2011 | Cillian Willis | Ireland | 19-Jan-1985 | 26(262) |
| 05-May-2012 | Fionn Carr | Ireland | 17-Dec-1985 | 26(140) |
| 20-Apr-2012 | Richard Strauss | Ireland | 29-Jan-1986 | 26(82) |
| 05-May-2012 | Sean Cronin | Ireland | 06-May-1986 | 25(365) |
| 05-May-2012 | Devin Toner | Ireland | 29-Jun-1986 | 25(311) |
| 20-Apr-2012 | Fergus McFaddon | Ireland | 17-Jun-1986 | 25(308) |
| 20-Apr-2012 | Sean O'Brien | Ireland | 14-Feb-1987 | 25(66) |
| 17-Feb-2012 | Jamie Hagan | Ireland | 15-Apr-1987 | 24(308) |
| 20-Apr-2012 | Luke Fitzgerald | Ireland | 13-Sep-1987 | 24(220) |
| 20-Apr-2012 | Cian Healy | Ireland | 07-Oct-1987 | 24(196) |
| 02-Mar-2012 | Eion O'Malley | Ireland | 06-Jul-1988 | 23(239) |
| 05-May-2012 | Ian Madigan | Ireland | 21-Mar-1989 | 23(45) |
| 05-May-2012 | David Kearney | Ireland | 19-Jun-1989 | 22(321) |
| 01-Oct-2011 | Ciaran Ruddock | Ireland | 11-Feb-1989 | 22(232) |
| 05-May-2012 | Jack McGrath | Ireland | 11-Oct-1989 | 22(207) |
| 25-Feb-2012 | Mark Flanagan | Ireland | 02-Aug-1989 | 22(207) |
| 05-May-2012 | Noel Reid | Ireland | 22-May-1990 | 21(349) |
| 05-May-2012 | Dominic Ryan | Ireland | 28-May-1990 | 21(343) |
| 09-Feb-2012 | Darren Hudson | Ireland | 09-Jun-1990 | 21(245) |
| 13-Apr-2012 | Rhys Ruddock | Ireland | 13-Oct-1990 | 21(183) |
| 02-Sep-2011 | John Cooney | Ireland | 01-May-1990 | 21(124) |
| 25-Feb-2012 | Colm O'Shea | Ireland | 19-Jan-1991 | 21(37) |
| 05-May-2012 | Brendan Macken | Ireland | 19-May-1991 | 20(352) |
| 05-May-2012 | Andrew Conway | Ireland | 11-Jul-1991 | 20(299) |
| 24-Sep-2011 | Jordi Murphy | Ireland | 22-Apr-1991 | 20(155) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).