| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 04-Sep-2010 |  George North | Scarlets | Wales | 13-Apr-1992 | 18(144) |
| 06-Jan-2011 |  Jonathan Evans | Gwent Dragons | Wales | 25-Jul-1992 | 18(165) |
| 19-Nov-2010 | Matthew Morgan | Ospreys | Wales | 23-Apr-1992 | 18(210) |
| 25-Feb-2011 | Stuart Hogg | Glasgow Warriors | Scotland | 24-Jun-1992 | 18(246) |
| 13-Feb-2011 | Tom Prydie | Ospreys | Wales | 23-Feb-1992 | 18(356) |
| 04-Mar-2011 | Rhodri Jones | Scarlets | Wales | 23-Dec-1991 | 19(71) |
| 18-Mar-2011 |  Paddy Jackson | Ulster | Ireland | 05-Jan-1992 | 19(72) |
| 30-Oct-2010 |  Andrew Conway | Leinster | Ireland | 11-Jul-1991 | 19(111) |
| 24-Sep-2010 | Duncan Weir | Glasgow Warriors | Scotland | 10-May-1991 | 19(137) |
| 01-Jan-2011 | Eoin McKeown | Connacht | Ireland | 23-Jun-1991 | 19(192) |
| 21-Nov-2010 | Craig Gilroy | Ulster | Ireland | 11-Mar-1991 | 19(255) |
| 18-Sep-2010 | Matthew Pewtner | Gwent Dragons | Wales | 26-Dec-1990 | 19(266) |
| 04-Sep-2010 | Tommaso Benvenuti | Benetton Treviso | Italy | 12-Dec-1990 | 19(266) |
| 10-Feb-2011 | Brendan Macken | Leinster | Ireland | 19-May-1991 | 19(267) |
| 01-Jan-2011 | Luke Marshall | Ulster | Ireland | 03-Mar-1991 | 19(304) |
| 29-Oct-2010 |  Dan Fish | Cardiff Blues | Wales | 19-Dec-1990 | 19(314) |
| 13-Feb-2011 | Hanno Dirksen | Ospreys | South Africa | 31-Mar-1991 | 19(319) |
| 18-Sep-2010 | Rhys Ruddock | Leinster | Ireland | 13-Oct-1990 | 19(340) |
| 23-Oct-2010 | Toby Faletau | Gwent Dragons | Wales | 12-Nov-1990 | 19(345) |
| 27-Dec-2010 |  Patrick Butler | Munster | Ireland | 01-Dec-1990 | 20(26) |
| 19-Nov-2010 | Eoin Griffin | Connacht | Ireland | 18-Sep-1990 | 20(62) |
| 19-Nov-2010 | Kristian Phillips | Ospreys | Wales | 02-Sep-1990 | 20(78) |
| 03-Sep-2010 | Dominic Ryan | Leinster | Ireland | 28-May-1990 | 20(98) |
| 17-Sep-2010 | Tavis Knoyle | Scarlets | Wales | 02-Jun-1990 | 20(107) |
| 26-Nov-2010 |  Stuart McInally | Edinburgh Rugby | Scotland | 09-Aug-1990 | 20(109) |
| 17-Sep-2010 | Robert Harley | Glasgow Warriors | Scotland | 26-May-1990 | 20(114) |
| 12-Feb-2011 | Scott Williams | Scarlets | Wales | 10-Oct-1990 | 20(125) |
| 29-Apr-2011 | Steffan Jones | Gwent Dragons | Wales | 22-Nov-1990 | 20(158) |
| 29-Oct-2010 | Nevin Spence | Ulster | Ireland | 26-Apr-1990 | 20(186) |
| 24-Feb-2011 | Gareth Davies | Scarlets | Wales | 18-Aug-1990 | 20(190) |
| 30-Oct-2010 | Ashley Beck | Ospreys | Wales | 15-Apr-1990 | 20(198) |
| 23-Oct-2010 | Giovanbattista Venditti | Aironi Rugby | Italy | 27-Mar-1990 | 20(210) |
| 24-Sep-2010 | Adam Hughes | Gwent Dragons | Wales | 14-Feb-1990 | 20(222) |
| 18-Mar-2011 | Conor Gaston | Ulster | Ireland | 05-Aug-1990 | 20(225) |
| 30-Sep-2010 | Rhys Williams | Cardiff Blues | Wales | 16-Jan-1990 | 20(257) |
| 08-Jan-2011 | Alex Dunbar | Glasgow Warriors | Scotland | 23-Apr-1990 | 20(260) |
| 18-Sep-2010 | Lloyd Williams | Cardiff Blues | Wales | 30-Nov-1989 | 20(292) |
| 26-Dec-2010 | Simon Gardiner | Scarlets | Wales | 10-Feb-1990 | 20(319) |
| 03-Sep-2010 | Daniel Biggar | Ospreys | Wales | 16-Oct-1989 | 20(322) |
| 13-Feb-2011 | Simon Zebo | Munster | Ireland | 16-Mar-1990 | 20(334) |
| 03-Dec-2010 | Dan Newton | Scarlets | Wales | 30-Dec-1989 | 20(338) |
| 25-Feb-2011 | Rhys Downes | Cardiff Blues | Wales | 10-Mar-1990 | 20(352) |
| 19-Nov-2010 | Dermot Murphy | Connacht | Ireland | 02-Dec-1989 | 20(352) |
| 03-Sep-2010 | Richie Gray | Glasgow Warriors | Scotland | 24-Aug-1989 | 21(10) |
| 05-Nov-2010 | Raffaele Joshua Furno | Aironi Rugby | Italy | 21-Oct-1989 | 21(15) |
| 29-Oct-2010 | Peter Horne | Glasgow Warriors | Scotland | 05-Oct-1989 | 21(24) |
| 04-Mar-2011 | David Denton | Edinburgh Rugby | Scotland | 05-Feb-1990 | 21(27) |
| 04-Sep-2010 | Scott Andrews | Cardiff Blues | Wales | 01-Aug-1989 | 21(34) |
| 03-Sep-2010 | Henry Pyrgos | Glasgow Warriors | Scotland | 09-Jul-1989 | 21(56) |
| 21-Nov-2010 | Peter O'Mahony | Munster | Ireland | 17-Sep-1989 | 21(65) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).