| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 23-May-2015 |  Nicky Smith | Ospreys | Wales | 07-Apr-1994 | 21(46) |
| 22-May-2015 | Jonny Gray | Glasgow Warriors | Scotland | 14-Mar-1994 | 21(69) |
| 22-May-2015 | Adam Ashe | Glasgow Warriors | Scotland | 24-Jul-1993 | 21(302) |
| 22-May-2015 | Finn Russell | Glasgow Warriors | Scotland | 23-Sep-1992 | 22(241) |
| 23-May-2015 | Dan Baker | Ospreys | Wales | 05-Jul-1992 | 22(322) |
| 22-May-2015 | Stuart Hogg | Glasgow Warriors | Scotland | 24-Jun-1992 | 22(332) |
| 23-May-2015 | Eli Walker | Ospreys | Wales | 28-Mar-1992 | 23(55) |
| 22-May-2015 |  Iain Henderson | Ulster | Ireland | 21-Feb-1992 | 23(90) |
| 23-May-2015 | Jeff Hassler | Ospreys | Canada | 21-Aug-1991 | 23(275) |
| 23-May-2015 | Tyler Ardron | Ospreys | Canada | 16-Jun-1991 | 23(341) |
| 22-May-2015 | Craig Gilroy | Ulster | Ireland | 11-Mar-1991 | 24(72) |
| 23-May-2015 | Ben John | Ospreys | Wales | 28-Feb-1991 | 24(84) |
| 23-May-2015 |  Patrick Butler | Munster | Ireland | 01-Dec-1990 | 24(173) |
| 23-May-2015 | Josh Matavasi | Ospreys | Fiji | 05-Oct-1990 | 24(230) |
| 30-May-2015 | Robert Harley | Glasgow Warriors | Scotland | 26-May-1990 | 25(4) |
| 23-May-2015 | CJ Stander | Munster | Ireland | 05-Apr-1990 | 25(48) |
| 23-May-2015 | Simon Zebo | Munster | Ireland | 16-Mar-1990 | 25(68) |
| 23-May-2015 | Daniel Biggar | Ospreys | Wales | 16-Oct-1989 | 25(219) |
| 22-May-2015 | Peter Horne | Glasgow Warriors | Scotland | 05-Oct-1989 | 25(229) |
| 23-May-2015 | Peter O'Mahony | Munster | Ireland | 17-Sep-1989 | 25(248) |
| 22-May-2015 | Roussouw De Klerk | Glasgow Warriors | South Africa | 21-Aug-1989 | 25(274) |
| 23-May-2015 | Justin Tipuric | Ospreys | Wales | 06-Aug-1989 | 25(290) |
| 22-May-2015 | Chris Fusaro | Glasgow Warriors | Scotland | 21-Jul-1989 | 25(305) |
| 22-May-2015 | Henry Pyrgos | Glasgow Warriors | Scotland | 09-Jul-1989 | 25(317) |
| 22-May-2015 | Paul Jackson | Ulster | Ireland | 24-Jun-1989 | 25(332) |
| 22-May-2015 | Fraser Brown | Glasgow Warriors | Scotland | 20-Jun-1989 | 25(336) |
| 30-May-2015 | Ryan Wilson | Glasgow Warriors | Scotland | 18-May-1989 | 26(12) |
| 23-May-2015 | Conor Murray | Munster | Ireland | 20-Apr-1989 | 26(33) |
| 22-May-2015 | Nikola Matawalu | Glasgow Warriors | Fiji | 08-Mar-1989 | 26(75) |
| 23-May-2015 | Rhys Webb | Ospreys | Wales | 09-Dec-1988 | 26(165) |
| 30-May-2015 | Dave Kilcoyne | Munster | Ireland | 14-Dec-1988 | 26(167) |
| 23-May-2015 | Daniel Evans | Ospreys | Wales | 15-Nov-1988 | 26(189) |
| 23-May-2015 | Dimitri Arhip | Ospreys | Moldova | 12-Nov-1988 | 26(192) |
| 23-May-2015 | Scott Baldwin | Ospreys | Wales | 12-Jul-1988 | 26(315) |
| 22-May-2015 | Tommy Seymour | Glasgow Warriors | Scotland | 01-Jul-1988 | 26(325) |
| 30-May-2015 | Leone Nakarawa | Glasgow Warriors | Fiji | 02-Apr-1988 | 27(57) |
| 23-May-2015 | Stephen Archer | Munster | Ireland | 29-Jan-1988 | 27(114) |
| 23-May-2015 | Dan Lydiatt | Ospreys | Wales | 18-Dec-1987 | 27(156) |
| 23-May-2015 | Keith Earls | Munster | Ireland | 02-Oct-1987 | 27(233) |
| 23-May-2015 | Felix Jones | Munster | Ireland | 15-Aug-1987 | 27(281) |
| 22-May-2015 | Richard Vernon | Glasgow Warriors | Scotland | 07-Jul-1987 | 27(319) |
| 22-May-2015 | Darren Cave | Ulster | Ireland | 05-Apr-1987 | 28(47) |
| 23-May-2015 | Ian Keatley | Munster | Ireland | 01-Apr-1987 | 28(52) |
| 30-May-2015 | Gordon Reid | Glasgow Warriors | Scotland | 04-Mar-1987 | 28(87) |
| 22-May-2015 | Joshua Strauss | Glasgow Warriors | Scotland | 23-Oct-1986 | 28(211) |
| 22-May-2015 | Louis Ludik | Ulster | South Africa | 08-Oct-1986 | 28(226) |
| 30-May-2015 | Daniel Van Der Merwe | Glasgow Warriors | Canada | 28-Apr-1986 | 29(32) |
| 30-May-2015 | Duncan Williams | Munster | Ireland | 17-Apr-1986 | 29(43) |
| 22-May-2015 | Richard Lutton | Ulster | England | 26-Feb-1986 | 29(85) |
| 22-May-2015 | Callum Black | Ulster | England | 25-Feb-1986 | 29(86) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).