| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 05-May-2012 | Maama Molitika | Tonga | 26-Aug-1974 | 37(253) |
| 22-Apr-2012 | Martyn Williams | Wales | 01-Sep-1975 | 36(234) |
| 24-Mar-2012 | Xavier Rush | New Zealand | 13-Jul-1977 | 34(255) |
| 23-Dec-2011 | Taufa'ao Filise | Tonga | 26-May-1977 | 34(211) |
| 01-Oct-2011 | Deinol Jones | Wales | 18-Nov-1977 | 33(317) |
| 24-Mar-2012 | Dan Parks | Scotland | 26-May-1978 | 33(303) |
| 03-Mar-2012 | Paul Tito | New Zealand | 09-Jun-1978 | 33(268) |
| 22-Apr-2012 | Ben Blair | New Zealand | 26-Mar-1979 | 33(28) |
| 05-May-2012 | Ceri Sweeney | Wales | 21-Jan-1980 | 32(105) |
| 05-May-2012 | Gethin Jenkins | Wales | 17-Nov-1980 | 31(170) |
| 03-Mar-2012 | Richard Mustoe | Wales | 09-Dec-1981 | 30(85) |
| 24-Feb-2012 | Gavin Henson | Wales | 01-Feb-1982 | 30(23) |
| 05-May-2012 | Casey Laulala | New Zealand | 03-May-1982 | 30(3) |
| 15-Mar-2012 | T Rhys Thomas | Wales | 23-Apr-1982 | 29(327) |
| 14-Apr-2012 | John Yapp | Wales | 09-Apr-1983 | 29(6) |
| 15-Mar-2012 | Richie Rees | Wales | 21-May-1983 | 28(299) |
| 30-Mar-2012 | Ryan Tyrrell | Australia | 09-Nov-1983 | 28(142) |
| 14-Apr-2012 | Gavin Evans | Wales | 18-Jul-1984 | 27(270) |
| 11-Sep-2011 | Gareth Davies | Wales | 02-Mar-1984 | 27(192) |
| 05-May-2012 | Bradley Davies | Wales | 09-Jan-1985 | 27(116) |
| 14-Apr-2012 | Michael Paterson | New Zealand | 09-May-1985 | 26(341) |
| 05-May-2012 | Daffyd Hewitt | Wales | 21-Aug-1985 | 26(258) |
| 05-May-2012 | Andries Pretorious | Wales | 26-Sep-1985 | 26(222) |
| 05-May-2012 | Chris Czekaj | Wales | 14-Dec-1985 | 26(143) |
| 30-Mar-2012 | Jamie Roberts | Wales | 08-Nov-1986 | 25(143) |
| 05-May-2012 | Marc Breeze | Wales | 11-Feb-1987 | 25(84) |
| 22-Apr-2012 | Tom James | Wales | 17-Apr-1987 | 25(6) |
| 05-May-2012 | James Down | Wales | 29-Aug-1987 | 24(250) |
| 14-Apr-2012 | Sam Hobbs | Wales | 13-May-1988 | 23(336) |
| 14-Apr-2012 | Leigh Halfpenny | Wales | 22-Dec-1988 | 23(113) |
| 07-Jan-2012 | Sam Warburton | Wales | 05-Oct-1988 | 23(93) |
| 05-May-2012 | Scott Andrews | Wales | 01-Aug-1989 | 22(278) |
| 05-May-2012 | Lloyd Williams | Wales | 30-Nov-1989 | 22(157) |
| 05-May-2012 | Alex Cuthbert | Wales | 05-Apr-1990 | 22(31) |
| 08-Oct-2011 | Rhys Williams | Wales | 16-Jan-1990 | 21(265) |
| 05-May-2012 | Josh Navidi | Wales | 30-Dec-1990 | 21(127) |
| 02-Dec-2011 | Dan Fish | Wales | 19-Dec-1990 | 20(348) |
| 22-Apr-2012 | Luke Hamilton | Scotland | 07-Jan-1992 | 20(106) |
| 30-Mar-2012 | Macauley Cook | Wales | 31-Dec-1991 | 20(90) |
| 15-Mar-2012 | Cory Hill | Wales | 10-Feb-1992 | 20(34) |
| 08-Oct-2011 | Thomas Young | Wales | 18-May-1992 | 19(142) |
| 05-May-2012 | Harry Robinson | Wales | 16-Apr-1993 | 19(19) |
| 01-Oct-2011 | Lewis Jones | Wales | 24-Nov-1992 | 18(311) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).