| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 04-Mar-2017 | Corey Domachowski | Wales | 19-Sep-1996 | 20(166) |
| 07-Oct-2016 | Garyn Smith | Wales | 12-Jul-1995 | 21(88) |
| 03-Sep-2016 | Tomos Williams | Wales | 01-Jan-1995 | 21(246) |
| 04-Mar-2017 | Aled Summerhill | Wales | 02-Nov-1994 | 22(123) |
| 18-Feb-2017 | Sion Bennett | Wales | 27-Nov-1993 | 23(83) |
| 03-Sep-2016 | Ellis Jenkins | Wales | 29-Apr-1993 | 23(127) |
| 03-Sep-2016 | Cory Allen | Wales | 11-Feb-1993 | 23(204) |
| 16-Sep-2016 | Matthew Morgan | Wales | 23-Apr-1992 | 24(146) |
| 03-Sep-2016 | Kirby Myhill | Wales | 05-Feb-1992 | 24(211) |
| 03-Sep-2016 | Macauley Cook | Wales | 31-Dec-1991 | 24(247) |
| 03-Sep-2016 | Steve Shingler | Wales | 20-Jun-1991 | 25(76) |
| 09-Sep-2016 | Gareth Anscombe | Wales | 10-May-1991 | 25(123) |
| 03-Sep-2016 | Josh Navidi | Wales | 30-Dec-1990 | 25(248) |
| 03-Sep-2016 | Dan Fish | Wales | 19-Dec-1990 | 25(259) |
| 04-Nov-2016 | Willis Halaholo | Wales | 06-Jul-1990 | 26(122) |
| 09-Sep-2016 | Alex Cuthbert | Wales | 05-Apr-1990 | 26(158) |
| 28-Oct-2016 | Cam Dolan | United States | 07-Mar-1990 | 26(236) |
| 16-Sep-2016 | Lloyd Williams | Wales | 30-Nov-1989 | 26(291) |
| 09-Sep-2016 | Kristian Dacey | Wales | 25-Jul-1989 | 27(46) |
| 24-Sep-2016 | Scott Andrews | Wales | 01-Aug-1989 | 27(54) |
| 16-Sep-2016 | Sam Warburton | Wales | 05-Oct-1988 | 27(346) |
| 03-Sep-2016 | Blaine Scully | United States | 29-Feb-1988 | 28(187) |
| 28-Oct-2016 | James Down | Wales | 29-Aug-1987 | 29(61) |
| 07-Jan-2017 | Anton Peikrishvili | Georgia | 18-Sep-1987 | 29(112) |
| 03-Sep-2016 | Tom James | Wales | 17-Apr-1987 | 29(140) |
| 03-Sep-2016 | George Earle | South Africa | 09-Jan-1987 | 29(238) |
| 03-Sep-2016 | Rhys Gill | Wales | 30-Oct-1986 | 29(309) |
| 03-Sep-2016 | Reynold Lee-lo | Samoa | 28-Feb-1986 | 30(188) |
| 16-Sep-2016 | Josh Turnbull | Wales | 12-Mar-1984 | 32(188) |
| 03-Sep-2016 | Nick Williams | New Zealand | 02-Dec-1983 | 32(276) |
| 04-Nov-2016 | Jarrad Hoeata | New Zealand | 12-Dec-1983 | 32(328) |
| 24-Sep-2016 | Matthew Rees | Wales | 09-Dec-1980 | 35(290) |
| 09-Sep-2016 | Gethin Jenkins | Wales | 17-Nov-1980 | 35(297) |
| 03-Sep-2016 | Taufa'ao Filise | Tonga | 26-May-1977 | 39(101) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).