| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 24-Feb-2013 | Paddy Jackson | Ireland | 05-Jan-1992 | 21(51) |
| 02-Feb-2013 | Craig Gilroy | Ireland | 11-Mar-1991 | 21(329) |
| 24-Feb-2013 | Luke Marshall | Ireland | 03-Mar-1991 | 21(359) |
| 02-Feb-2013 | Simon Zebo | Ireland | 16-Mar-1990 | 22(324) |
| 02-Feb-2013 | Peter O'Mahony | Ireland | 17-Sep-1989 | 23(138) |
| 02-Feb-2013 | Conor Murray | Ireland | 20-Apr-1989 | 23(288) |
| 02-Feb-2013 | Cian Healy | Ireland | 07-Oct-1987 | 25(119) |
| 24-Feb-2013 | Keith Earls | Ireland | 02-Oct-1987 | 25(146) |
| 02-Feb-2013 | Sean O'Brien | Ireland | 14-Feb-1987 | 25(354) |
| 09-Mar-2013 | Fergus McFaddon | Ireland | 17-Jun-1986 | 26(266) |
| 02-Feb-2013 | Jonathan Sexton | Ireland | 11-Jul-1985 | 27(206) |
| 02-Feb-2013 | James Heaslip | Ireland | 15-Dec-1983 | 29(50) |
| 02-Feb-2013 | Donnacha Ryan | Ireland | 11-Dec-1983 | 29(54) |
| 02-Feb-2013 | Robert Kearney | Ireland | 26-Mar-1983 | 29(314) |
| 02-Feb-2013 | Rory Best | Ireland | 15-Aug-1982 | 30(172) |
| 02-Feb-2013 | Mike McCarthy | Ireland | 27-Nov-1981 | 31(67) |
| 24-Feb-2013 | Tom Court | Ireland | 06-Nov-1980 | 32(110) |
| 02-Feb-2013 | Gordon D'Arcy | Ireland | 10-Feb-1980 | 32(358) |
| 02-Feb-2013 | Mike Ross | Ireland | 21-Dec-1979 | 33(44) |
| 24-Feb-2013 | Donncha O'Callaghan | Ireland | 24-Mar-1979 | 33(338) |
| 02-Feb-2013 | Brian O'Driscoll | Ireland | 21-Jan-1979 | 34(13) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).