| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 26-Nov-2017 | Paul James | Wales | 13-May-1982 | 35(198) |
| 21-Apr-2018 | Giorgi Nemsadze | Georgia | 26-Sep-1984 | 33(207) |
| 28-Apr-2018 | Bradley Davies | Wales | 09-Jan-1985 | 33(109) |
| 21-Apr-2018 | James Hook | Wales | 27-Jun-1985 | 32(298) |
| 28-Apr-2018 | Alan Wyn Jones | Wales | 19-Sep-1985 | 32(221) |
| 04-Nov-2017 | Brendon Leonard | New Zealand | 16-Apr-1985 | 32(202) |
| 16-Feb-2018 | Robert McCusker | Wales | 12-Oct-1985 | 32(127) |
| 28-Apr-2018 | Kieron Fonotia | Samoa | 02-Feb-1988 | 30(86) |
| 31-Dec-2017 | Dan Lydiatt | Wales | 18-Dec-1987 | 30(14) |
| 06-Jan-2018 | Scott Baldwin | Wales | 12-Jul-1988 | 29(178) |
| 28-Apr-2018 | Dimitri Arhip | Moldova | 12-Nov-1988 | 29(167) |
| 28-Apr-2018 | Daniel Evans | Wales | 15-Nov-1988 | 29(164) |
| 06-Jan-2018 | Rhys Webb | Wales | 09-Dec-1988 | 29(28) |
| 28-Apr-2018 | Justin Tipuric | Wales | 06-Aug-1989 | 28(265) |
| 28-Apr-2018 | Daniel Biggar | Wales | 16-Oct-1989 | 28(194) |
| 21-Apr-2018 | Ma'afu Fia | Tonga | 22-Nov-1989 | 28(150) |
| 21-Apr-2018 | Guy Mercer | England | 12-Dec-1989 | 28(130) |
| 06-Apr-2018 | Ashley Beck | Wales | 15-Apr-1990 | 27(356) |
| 28-Apr-2018 | James King | Wales | 24-Jul-1990 | 27(278) |
| 21-Apr-2018 | Lloyd Ashley | Wales | 02-Feb-1991 | 27(78) |
| 28-Apr-2018 | Hanno Dirksen | South Africa | 31-Mar-1991 | 27(28) |
| 26-Dec-2017 | Ben John | Wales | 28-Feb-1991 | 26(302) |
| 28-Apr-2018 | Jeff Hassler | Canada | 21-Aug-1991 | 26(251) |
| 21-Apr-2018 | Rhodri Jones | Wales | 23-Dec-1991 | 26(120) |
| 24-Feb-2018 | Sam Parry | Wales | 17-Dec-1991 | 26(70) |
| 29-Sep-2017 | Jay Baker | Wales | 06-Oct-1991 | 25(359) |
| 28-Apr-2018 | Tom Habberfield | Wales | 19-May-1992 | 25(344) |
| 28-Apr-2018 | Sam Cross | Wales | 26-Aug-1992 | 25(245) |
| 22-Sep-2017 | Dan Baker | Wales | 05-Jul-1992 | 25(79) |
| 31-Dec-2017 | Cory Allen | Wales | 11-Feb-1993 | 24(323) |
| 21-Apr-2018 | Sam Davies | Wales | 06-Oct-1993 | 24(197) |
| 02-Dec-2017 | Gareth Thomas | Wales | 02-Aug-1993 | 24(122) |
| 28-Apr-2018 | Nicky Smith | Wales | 07-Apr-1994 | 24(21) |
| 24-Mar-2018 | Oliver Cracknell | Wales | 26-May-1994 | 23(302) |
| 28-Apr-2018 | Scott Otten | Wales | 19-Jul-1994 | 23(283) |
| 09-Feb-2018 | Dafydd Howells | Wales | 22-Mar-1995 | 22(325) |
| 21-Apr-2018 | Luke Price | Wales | 26-Sep-1995 | 22(208) |
| 02-Sep-2017 | Rory Thornton | Wales | 16-Mar-1995 | 22(171) |
| 21-Apr-2018 | Adam Beard | Wales | 07-Jan-1996 | 22(105) |
| 21-Apr-2018 | Ifan Phillips | Wales | 29-Jan-1996 | 22(83) |
| 21-Apr-2018 | Joe Thomas | Wales | 21-Feb-1996 | 22(60) |
| 28-Apr-2018 | Owen Watkin | Wales | 12-Oct-1996 | 21(198) |
| 21-Apr-2018 | Matthew Aubrey | Wales | 04-Jun-1997 | 20(321) |
| 24-Feb-2018 | Reuben Morgan-Williams | Wales | 02-Feb-1998 | 20(22) |
| 27-Oct-2017 | Keelan Giles | Wales | 29-Jan-1998 | 19(271) |
| 21-Apr-2018 | Dylan Moss | Wales | 08-Sep-1998 | 19(225) |
| 09-Feb-2018 | Will Jones | Wales | 03-Dec-1998 | 19(68) |
| 21-Apr-2018 | Dewi Cross | Wales | 06-Dec-1999 | 18(137) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).