| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 07-Feb-2015 |  Jonny Gray | Scotland | Scotland | 14-Mar-1994 | 20(330) |
| 06-Feb-2015 |  Anthony Watson | England | England | 26-Feb-1994 | 20(345) |
| 15-Mar-2015 |  Gael Fickou | France | France | 26-Mar-1994 | 20(354) |
| 07-Feb-2015 | Teddy Thomas | France | France | 18-Sep-1993 | 21(142) |
| 21-Mar-2015 | Adam Ashe | Scotland | Scotland | 24-Jul-1993 | 21(240) |
| 07-Feb-2015 |  Robbie Henshaw | Ireland | Ireland | 12-Jun-1993 | 21(240) |
| 15-Mar-2015 |  Tommaso Allan | Italy | Italy | 26-Apr-1993 | 21(323) |
| 01-Mar-2015 | Jack Nowell | England | England | 11-Apr-1993 | 21(324) |
| 06-Feb-2015 | George Ford | England | England | 16-Mar-1993 | 21(327) |
| 07-Feb-2015 | Michele Campagnaro | Italy | Italy | 13-Mar-1993 | 21(331) |
| 07-Feb-2015 | Mark Bennett | Scotland | Scotland | 03-Feb-1993 | 22(4) |
| 06-Feb-2015 |  Samson Lee | Wales | Wales | 30-Nov-1992 | 22(68) |
| 28-Feb-2015 | Enrico Bacchin | Italy | Italy | 28-Nov-1992 | 22(92) |
| 06-Feb-2015 | Billy Vunipola | England | England | 03-Nov-1992 | 22(95) |
| 07-Feb-2015 | Finn Russell | Scotland | Scotland | 23-Sep-1992 | 22(137) |
| 07-Feb-2015 | Stuart Hogg | Scotland | Scotland | 24-Jun-1992 | 22(228) |
| 06-Feb-2015 | George North | Wales | Wales | 13-Apr-1992 | 22(299) |
| 21-Mar-2015 | Rob Evans | Wales | Wales | 14-Apr-1992 | 22(341) |
| 07-Feb-2015 | Leonardo Sarto | Italy | Italy | 15-Jan-1992 | 23(23) |
| 28-Feb-2015 | Michele Visentin | Italy | Italy | 13-Dec-1991 | 23(77) |
| 21-Mar-2015 | Jules Plisson | France | France | 20-Aug-1991 | 23(213) |
| 06-Feb-2015 | Jake Ball | Wales | Wales | 21-Jun-1991 | 23(230) |
| 06-Feb-2015 | Jonathan Joseph | England | England | 21-May-1991 | 23(261) |
| 07-Feb-2015 | Jordi Murphy | Ireland | Ireland | 22-Apr-1991 | 23(291) |
| 15-Feb-2015 | Liam Williams | Wales | Wales | 09-Apr-1991 | 23(312) |
| 07-Feb-2015 | Luca Morisi | Italy | Italy | 22-Feb-1991 | 23(350) |
| 06-Feb-2015 | Toby Faletau | Wales | Wales | 12-Nov-1990 | 24(86) |
| 14-Mar-2015 | Matt Scott | Scotland | Scotland | 30-Sep-1990 | 24(165) |
| 28-Feb-2015 | Romain Taofifenua | France | France | 14-Sep-1990 | 24(167) |
| 14-Feb-2015 | Eddy Ben Arous | France | France | 25-Aug-1990 | 24(173) |
| 06-Feb-2015 | Joe Marler | England | England | 07-Jul-1990 | 24(214) |
| 14-Mar-2015 | Douglas Fife | Scotland | Scotland | 08-Aug-1990 | 24(218) |
| 15-Mar-2015 | Noa Nakaitaci | France | France | 11-Jul-1990 | 24(247) |
| 07-Feb-2015 | Robert Harley | Scotland | Scotland | 26-May-1990 | 24(257) |
| 07-Feb-2015 | Alex Dunbar | Scotland | Scotland | 23-Apr-1990 | 24(290) |
| 06-Feb-2015 | Alex Cuthbert | Wales | Wales | 05-Apr-1990 | 24(307) |
| 06-Feb-2015 | Jonny May | England | England | 01-Apr-1990 | 24(311) |
| 28-Feb-2015 | Brice Dulin | France | France | 13-Apr-1990 | 24(321) |
| 14-Feb-2015 | Giovanbattista Venditti | Italy | Italy | 27-Mar-1990 | 24(324) |
| 07-Feb-2015 | Simon Zebo | Ireland | Ireland | 16-Mar-1990 | 24(328) |
| 07-Feb-2015 | Eduardo Gori | Italy | Italy | 05-Mar-1990 | 24(339) |
| 06-Feb-2015 | George Kruis | England | England | 22-Feb-1990 | 24(349) |
| 14-Mar-2015 | David Denton | Scotland | Scotland | 05-Feb-1990 | 25(37) |
| 28-Feb-2015 | Remi Lamerat | France | France | 14-Jan-1990 | 25(45) |
| 07-Feb-2015 | Raffaele Joshua Furno | Italy | Italy | 21-Oct-1989 | 25(109) |
| 07-Feb-2015 | Rabah Slimani | France | France | 18-Oct-1989 | 25(112) |
| 06-Feb-2015 | Daniel Biggar | Wales | Wales | 16-Oct-1989 | 25(113) |
| 07-Feb-2015 | Jack McGrath | Ireland | Ireland | 11-Oct-1989 | 25(119) |
| 07-Feb-2015 | Peter O'Mahony | Ireland | Ireland | 17-Sep-1989 | 25(143) |
| 28-Feb-2015 | Peter Horne | Scotland | Scotland | 05-Oct-1989 | 25(146) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).