| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 13-Oct-2012 | Andrew Conway | Ireland | 11-Jul-1991 | 21(95) |
| 13-Oct-2012 | Ian Madigan | Ireland | 21-Mar-1989 | 23(206) |
| 12-Jan-2013 | Ciaran Ruddock | Ireland | 11-Feb-1989 | 23(335) |
| 13-Oct-2012 | Cian Healy | Ireland | 07-Oct-1987 | 25(7) |
| 12-Jan-2013 | Luke Fitzgerald | Ireland | 13-Sep-1987 | 25(122) |
| 09-Dec-2012 | Sean O'Brien | Ireland | 14-Feb-1987 | 25(299) |
| 13-Oct-2012 | Fergus McFaddon | Ireland | 17-Jun-1986 | 26(119) |
| 20-Oct-2012 | Sean Cronin | Ireland | 06-May-1986 | 26(168) |
| 12-Jan-2013 | Devin Toner | Ireland | 29-Jun-1986 | 26(198) |
| 13-Oct-2012 | Richard Strauss | Ireland | 29-Jan-1986 | 26(258) |
| 13-Oct-2012 | Jonathan Sexton | Ireland | 11-Jul-1985 | 27(94) |
| 15-Dec-2012 | Hendrik van der Merwe | South Africa | 03-May-1985 | 27(226) |
| 13-Oct-2012 | Kevin McLaughlin | Ireland | 20-Sep-1984 | 28(23) |
| 13-Oct-2012 | James Heaslip | Ireland | 15-Dec-1983 | 28(303) |
| 12-Jan-2013 | Robert Kearney | Ireland | 26-Mar-1983 | 29(293) |
| 09-Dec-2012 | Andrew Goodman | New Zealand | 28-Oct-1982 | 30(43) |
| 13-Oct-2012 | Isikeli Nacewa | Fiji | 22-Jul-1982 | 30(84) |
| 13-Oct-2012 | Shane Jennings | Ireland | 08-Jul-1981 | 31(97) |
| 13-Oct-2012 | Eion Redden | Ireland | 20-Nov-1980 | 31(328) |
| 13-Oct-2012 | Damien Browne | Ireland | 17-May-1980 | 32(149) |
| 09-Dec-2012 | Issac Boss | Ireland | 09-Apr-1980 | 32(244) |
| 20-Oct-2012 | Gordon D'Arcy | Ireland | 10-Feb-1980 | 32(253) |
| 13-Oct-2012 | Mike Ross | Ireland | 21-Dec-1979 | 32(297) |
| 13-Oct-2012 | Brian O'Driscoll | Ireland | 21-Jan-1979 | 33(266) |
| 13-Oct-2012 | Leo Cullen | Ireland | 09-Jan-1978 | 34(278) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).