| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 28-Oct-2011 |  Mefin Davies | Ospreys | Wales | 02-Sep-1972 | 39(56) |
| 26-Dec-2011 |  John Hayes | Munster | Ireland | 02-Nov-1973 | 38(54) |
| 05-May-2012 |  Maama Molitika | Cardiff Blues | Tonga | 26-Aug-1974 | 37(253) |
| 20-Apr-2012 |  Brad Thorn | Leinster | New Zealand | 03-Feb-1975 | 37(77) |
| 20-Apr-2012 |  Stefan Terblanche | Ulster | South Africa | 02-Jul-1975 | 36(293) |
| 22-Apr-2012 | Martyn Williams | Cardiff Blues | Wales | 01-Sep-1975 | 36(234) |
| 02-Mar-2012 |  Ulises Gamboa | Edinburgh Rugby | Argentina | 03-Oct-1975 | 36(151) |
| 24-Mar-2012 | David Wallace | Munster | Ireland | 08-Jul-1976 | 35(260) |
| 02-Mar-2012 | Ian Gough | Ospreys | Wales | 10-Nov-1976 | 35(113) |
| 09-Feb-2012 |  Iestyn Thomas | Scarlets | Wales | 15-Dec-1976 | 35(56) |
| 20-Apr-2012 | Shane Williams | Ospreys | Wales | 26-Feb-1977 | 35(54) |
| 31-Mar-2012 | Ronan O'Gara | Munster | Ireland | 07-Mar-1977 | 35(25) |
| 20-Apr-2012 | Steve Jones | Gwent Dragons | Wales | 20-Apr-1977 | 35(1) |
| 24-Mar-2012 | Xavier Rush | Cardiff Blues | New Zealand | 13-Jul-1977 | 34(255) |
| 18-Feb-2012 | Ezio Galon | Benetton Treviso | Italy | 22-Jul-1977 | 34(211) |
| 21-Apr-2012 | Fabio Ongaro | Aironi Rugby | Italy | 23-Sep-1977 | 34(211) |
| 23-Dec-2011 | Taufa'ao Filise | Cardiff Blues | Tonga | 26-May-1977 | 34(211) |
| 31-Mar-2012 | Marcus Horan | Munster | Ireland | 07-Sep-1977 | 34(206) |
| 05-May-2012 | Michael Swift | Connacht | Ireland | 18-Oct-1977 | 34(200) |
| 05-May-2012 | Stephen Jones | Scarlets | Wales | 08-Dec-1977 | 34(149) |
| 26-Feb-2012 | Gavin Thomas | Gwent Dragons | Wales | 22-Oct-1977 | 34(127) |
| 20-Apr-2012 | Leo Cullen | Leinster | Ireland | 09-Jan-1978 | 34(102) |
| 28-Oct-2011 | Sonny Parker | Ospreys | Wales | 27-Aug-1977 | 34(62) |
| 05-May-2012 | Chris Paterson | Edinburgh Rugby | Scotland | 30-Mar-1978 | 34(37) |
| 03-Mar-2012 | Willem de Waal | Benetton Treviso | South Africa | 17-Feb-1978 | 34(15) |
| 22-Apr-2012 | Brendan Williams | Benetton Treviso | Australia | 21-May-1978 | 33(337) |
| 01-Oct-2011 | Deinol Jones | Cardiff Blues | Wales | 18-Nov-1977 | 33(317) |
| 24-Mar-2012 | Dan Parks | Cardiff Blues | Scotland | 26-May-1978 | 33(303) |
| 30-Sep-2011 | Peter Stringer | Munster | Ireland | 13-Dec-1977 | 33(291) |
| 03-Mar-2012 | Paul Tito | Cardiff Blues | New Zealand | 09-Jun-1978 | 33(268) |
| 05-May-2012 | Allan Jacobson | Edinburgh Rugby | Scotland | 22-Sep-1978 | 33(226) |
| 05-May-2012 | Michael O'Driscoll | Munster | Ireland | 08-Oct-1978 | 33(210) |
| 05-May-2012 | Gnazi Rouyet | Benetton Treviso | Italy | 22-Oct-1978 | 33(196) |
| 13-Apr-2012 | Scott Morgan | Gwent Dragons | Wales | 17-Oct-1978 | 33(179) |
| 24-Feb-2012 | Duncan Jones | Ospreys | Wales | 18-Sep-1978 | 33(159) |
| 05-May-2012 | Corniel Van Zyl | Benetton Treviso | Italy | 27-Jan-1979 | 33(99) |
| 20-Apr-2012 | Brian O'Driscoll | Leinster | Ireland | 21-Jan-1979 | 33(90) |
| 05-May-2012 | Deacon Manu | Scarlets | Fiji | 18-Feb-1979 | 33(77) |
| 03-Dec-2011 | Doug Howlett | Munster | New Zealand | 21-Sep-1978 | 33(73) |
| 05-May-2012 | Joe Bearman | Ospreys | England | 28-Feb-1979 | 33(67) |
| 23-Mar-2012 | George Stowers | Ospreys | Fiji | 14-Feb-1979 | 33(38) |
| 22-Apr-2012 | Ben Blair | Cardiff Blues | New Zealand | 26-Mar-1979 | 33(28) |
| 14-Apr-2012 | Donncha O'Callaghan | Munster | Ireland | 24-Mar-1979 | 33(22) |
| 05-May-2012 | Adrian Flavin | Connacht | Ireland | 06-Jun-1979 | 32(334) |
| 30-Mar-2012 | Mauro Bergamasco | Aironi Rugby | Italy | 01-May-1979 | 32(334) |
| 05-May-2012 | Robert Sidoli | Gwent Dragons | Wales | 21-Jun-1979 | 32(319) |
| 01-Oct-2011 | Augusto Allori | Benetton Treviso | Italy | 31-Dec-1978 | 32(274) |
| 20-Apr-2012 | Paddy Wallace | Ulster | Ireland | 27-Aug-1979 | 32(237) |
| 05-May-2012 | Nigel Brady | Ulster | Ireland | 09-Oct-1979 | 32(209) |
| 05-May-2012 | Paul O'Connell | Munster | Ireland | 20-Oct-1979 | 32(198) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).