| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 02-Dec-2017 | Mike Phillips | Wales | 29-Aug-1982 | 35(96) |
| 14-Apr-2018 | Werner Kruger | South Africa | 23-Jan-1985 | 33(81) |
| 14-Apr-2018 | Tom Varndell | England | 16-Aug-1985 | 32(241) |
| 07-Apr-2018 | John Barclay | Scotland | 24-Sep-1986 | 31(196) |
| 07-Apr-2018 | Ken Owens | Wales | 03-Jan-1987 | 31(94) |
| 07-Apr-2018 | Aaron Shingler | Wales | 07-Aug-1987 | 30(244) |
| 14-Apr-2018 | Geraint Rhys Jones | Wales | 23-Aug-1987 | 30(235) |
| 28-Apr-2018 | Hadleigh Parkes | Wales | 05-Oct-1987 | 30(206) |
| 07-Oct-2017 | Jon Davies | Wales | 05-Apr-1988 | 29(185) |
| 28-Apr-2018 | Leigh Halfpenny | Wales | 22-Dec-1988 | 29(127) |
| 09-Mar-2018 | Phil Price | Wales | 10-Nov-1988 | 29(119) |
| 14-Apr-2018 | Dylan Evans | Australia | 25-Jan-1989 | 29(79) |
| 14-Apr-2018 | David Bulbring | South Africa | 12-Sep-1989 | 28(214) |
| 28-Apr-2018 | Lewis Rawlins | Wales | 13-Apr-1990 | 28(15) |
| 28-Apr-2018 | Gareth Davies | Wales | 18-Aug-1990 | 27(253) |
| 28-Apr-2018 | Scott Williams | Wales | 10-Oct-1990 | 27(200) |
| 28-Apr-2018 | James Davies | Wales | 25-Oct-1990 | 27(185) |
| 17-Feb-2018 | Johnny McNicholl | Wales | 24-Sep-1990 | 27(146) |
| 24-Mar-2018 | Tom Williams | Wales | 02-Apr-1991 | 26(357) |
| 28-Oct-2017 | Jake Ball | Wales | 21-Jun-1991 | 26(130) |
| 09-Sep-2017 | Tom Grabham | Wales | 20-Jun-1991 | 26(82) |
| 28-Apr-2018 | Steven Cummins | Australia | 29-Mar-1992 | 26(30) |
| 28-Apr-2018 | Rob Evans | Wales | 14-Apr-1992 | 26(14) |
| 17-Feb-2018 | Tom Prydie | Wales | 23-Feb-1992 | 25(360) |
| 31-Dec-2017 | Wyn Jones | Wales | 26-Feb-1992 | 25(309) |
| 28-Apr-2018 | Tadhg Beirne | Ireland | 01-Aug-1992 | 25(270) |
| 14-Apr-2018 | Aled Davies | Wales | 19-Jul-1992 | 25(269) |
| 09-Mar-2018 | Jonathan Evans | Wales | 25-Jul-1992 | 25(227) |
| 28-Apr-2018 | Samson Lee | Wales | 30-Nov-1992 | 25(149) |
| 28-Apr-2018 | Rhys Patchell | Wales | 17-May-1993 | 24(346) |
| 24-Mar-2018 | Paul Asquith | Australia | 08-Dec-1993 | 24(106) |
| 14-Apr-2018 | Steffan Hughes | Wales | 17-Feb-1994 | 24(56) |
| 28-Apr-2018 | Steffan Evans | Wales | 01-Sep-1994 | 23(239) |
| 28-Apr-2018 | Will Boyde | Wales | 15-Dec-1994 | 23(134) |
| 28-Apr-2018 | Ryan Elias | Wales | 07-Jan-1995 | 23(111) |
| 14-Apr-2018 | Daniel Jones | Wales | 07-Jan-1996 | 22(98) |
| 14-Apr-2018 | Josh Macleod | Wales | 27-Oct-1996 | 21(169) |
| 28-Apr-2018 | Ioan Nicholas | Wales | 03-Apr-1998 | 20(25) |
| 14-Apr-2018 | Ryan Conbeer | Wales | 05-Feb-1999 | 19(68) |
| 24-Feb-2018 | Corey Baldwin | Wales | 13-Oct-1999 | 18(135) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).