| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 02-Feb-2013 |  Stuart Hogg | Scotland | Scotland | 24-Jun-1992 | 20(223) |
| 02-Feb-2013 |  George North | Wales | Wales | 13-Apr-1992 | 20(295) |
| 24-Feb-2013 |  Paddy Jackson | Ireland | Ireland | 05-Jan-1992 | 21(51) |
| 02-Feb-2013 |  Owen Farrell | England | England | 21-Sep-1991 | 21(135) |
| 16-Mar-2013 |  Sebastien Vahaamahina | France | France | 21-Oct-1991 | 21(147) |
| 23-Feb-2013 | Manu Tuilagi | England | England | 18-May-1991 | 21(282) |
| 02-Feb-2013 | Joe Launchberry | England | England | 12-Apr-1991 | 21(297) |
| 09-Mar-2013 | Duncan Weir | Scotland | Scotland | 10-May-1991 | 21(304) |
| 02-Feb-2013 | Craig Gilroy | Ireland | Ireland | 11-Mar-1991 | 21(329) |
| 24-Feb-2013 | Luke Marshall | Ireland | Ireland | 03-Mar-1991 | 21(359) |
| 03-Feb-2013 |  Tommaso Benvenuti | Italy | Italy | 12-Dec-1990 | 22(54) |
| 10-Mar-2013 | Makovina Vunipola | England | England | 13-Jan-1991 | 22(57) |
| 02-Feb-2013 | Toby Faletau | Wales | Wales | 12-Nov-1990 | 22(83) |
| 02-Feb-2013 | Matt Scott | Scotland | Scotland | 30-Sep-1990 | 22(126) |
| 02-Feb-2013 | Joe Marler | England | England | 07-Jul-1990 | 22(211) |
| 16-Mar-2013 | Grant Gilchrist | Scotland | Scotland | 09-Aug-1990 | 22(220) |
| 09-Feb-2013 | Robert Harley | Scotland | Scotland | 26-May-1990 | 22(260) |
| 02-Feb-2013 | Alex Cuthbert | Wales | Wales | 05-Apr-1990 | 22(304) |
| 03-Feb-2013 | Giovanbattista Venditti | Italy | Italy | 27-Mar-1990 | 22(314) |
| 02-Feb-2013 | Simon Zebo | Ireland | Ireland | 16-Mar-1990 | 22(324) |
| 23-Feb-2013 | Eduardo Gori | Italy | Italy | 05-Mar-1990 | 22(356) |
| 02-Feb-2013 | Daniel Biggar | Wales | Wales | 16-Oct-1989 | 23(109) |
| 02-Feb-2013 | Peter O'Mahony | Ireland | Ireland | 17-Sep-1989 | 23(138) |
| 10-Mar-2013 | Raffaele Joshua Furno | Italy | Italy | 21-Oct-1989 | 23(140) |
| 02-Feb-2013 | Ben Youngs | England | England | 05-Sep-1989 | 23(150) |
| 02-Feb-2013 | Richie Gray | Scotland | Scotland | 24-Aug-1989 | 23(162) |
| 09-Feb-2013 | Justin Tipuric | Wales | Wales | 06-Aug-1989 | 23(187) |
| 03-Feb-2013 | Benjamin Fall | France | France | 29-Apr-1989 | 23(280) |
| 02-Feb-2013 | Conor Murray | Ireland | Ireland | 20-Apr-1989 | 23(288) |
| 02-Feb-2013 | Ben Morgan | England | England | 18-Feb-1989 | 23(349) |
| 23-Feb-2013 | Courtney Lawes | England | England | 23-Feb-1989 | 24(0) |
| 03-Feb-2013 | Mazine Machenaud | France | France | 30-Dec-1988 | 24(35) |
| 02-Feb-2013 | Leigh Halfpenny | Wales | Wales | 22-Dec-1988 | 24(42) |
| 02-Feb-2013 | Billy Twelvetrees | England | England | 15-Nov-1988 | 24(79) |
| 03-Feb-2013 | Simone Favaro | Italy | Italy | 07-Nov-1988 | 24(88) |
| 23-Feb-2013 | Morgan Parra | France | France | 15-Nov-1988 | 24(100) |
| 02-Feb-2013 | Sam Warburton | Wales | Wales | 05-Oct-1988 | 24(120) |
| 02-Feb-2013 | Sean Maitland | Scotland | Scotland | 14-Sep-1988 | 24(141) |
| 09-Feb-2013 | Mathieu Bastareaud | France | France | 17-Sep-1988 | 24(145) |
| 02-Feb-2013 | Alex Goode | England | England | 07-May-1988 | 24(271) |
| 02-Feb-2013 | Jon Davies | Wales | Wales | 05-Apr-1988 | 24(303) |
| 02-Feb-2013 | Ruaridh Jackson | Scotland | Scotland | 12-Feb-1988 | 24(356) |
| 03-Feb-2013 | Wesley Fofana | France | France | 20-Jan-1988 | 25(15) |
| 03-Feb-2013 | Yohan Maestri | France | France | 14-Jan-1988 | 25(21) |
| 02-Feb-2013 | Cian Healy | Ireland | Ireland | 07-Oct-1987 | 25(119) |
| 24-Feb-2013 | Keith Earls | Ireland | Ireland | 02-Oct-1987 | 25(146) |
| 02-Feb-2013 | Aaron Shingler | Wales | Wales | 07-Aug-1987 | 25(180) |
| 02-Feb-2013 | Tim Visser | Scotland | Scotland | 29-May-1987 | 25(250) |
| 03-Feb-2013 | Francesco Minto | Italy | Italy | 20-May-1987 | 25(260) |
| 03-Feb-2013 | Luke McLean | Italy | Italy | 11-May-1987 | 25(269) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).