| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 04-Nov-2016 | Joe Bearman | England | 28-Feb-1979 | 37(250) |
| 25-Mar-2017 | Paul James | Wales | 13-May-1982 | 34(317) |
| 29-Apr-2017 | Brian Mujati | South Africa | 28-Sep-1984 | 32(213) |
| 06-May-2017 | Bradley Davies | Wales | 09-Jan-1985 | 32(117) |
| 26-Feb-2017 | Brendon Leonard | New Zealand | 16-Apr-1985 | 31(316) |
| 07-Jan-2017 | Alan Wyn Jones | Wales | 19-Sep-1985 | 31(110) |
| 04-Nov-2016 | Robert McCusker | Wales | 12-Oct-1985 | 31(23) |
| 26-Feb-2017 | Huw Gustafson | Wales | 08-Jul-1987 | 29(234) |
| 06-May-2017 | Kieron Fonotia | Samoa | 02-Feb-1988 | 29(94) |
| 29-Oct-2016 | Dan Lydiatt | Wales | 18-Dec-1987 | 28(316) |
| 06-May-2017 | Scott Baldwin | Wales | 12-Jul-1988 | 28(298) |
| 06-May-2017 | Daniel Evans | Wales | 15-Nov-1988 | 28(172) |
| 06-May-2017 | Rhys Webb | Wales | 09-Dec-1988 | 28(148) |
| 04-Nov-2016 | Dimitri Arhip | Moldova | 12-Nov-1988 | 27(357) |
| 06-May-2017 | Justin Tipuric | Wales | 06-Aug-1989 | 27(273) |
| 06-May-2017 | Daniel Biggar | Wales | 16-Oct-1989 | 27(202) |
| 07-Jan-2017 | Ma'afu Fia | Tonga | 22-Nov-1989 | 27(46) |
| 29-Apr-2017 | Ashley Beck | Wales | 15-Apr-1990 | 27(14) |
| 06-May-2017 | James King | Wales | 24-Jul-1990 | 26(287) |
| 06-May-2017 | Josh Matavasi | Fiji | 05-Oct-1990 | 26(214) |
| 08-Apr-2017 | Lloyd Ashley | Wales | 02-Feb-1991 | 26(66) |
| 10-Feb-2017 | Ben John | Wales | 28-Feb-1991 | 25(348) |
| 26-Feb-2017 | Hanno Dirksen | South Africa | 31-Mar-1991 | 25(333) |
| 06-May-2017 | Tyler Ardron | Canada | 16-Jun-1991 | 25(325) |
| 25-Nov-2016 | Tom Grabham | Wales | 20-Jun-1991 | 25(159) |
| 06-May-2017 | Rhodri Jones | Wales | 23-Dec-1991 | 25(135) |
| 25-Mar-2017 | Sam Parry | Wales | 17-Dec-1991 | 25(99) |
| 07-Oct-2016 | Jeff Hassler | Canada | 21-Aug-1991 | 25(48) |
| 06-May-2017 | Tom Habberfield | Wales | 19-May-1992 | 24(352) |
| 15-Apr-2017 | Dan Baker | Wales | 05-Jul-1992 | 24(284) |
| 04-Nov-2016 | Eli Walker | Wales | 28-Mar-1992 | 24(221) |
| 15-Apr-2017 | Sam Davies | Wales | 06-Oct-1993 | 23(191) |
| 06-May-2017 | Nicky Smith | Wales | 07-Apr-1994 | 23(29) |
| 08-Apr-2017 | Oliver Cracknell | Wales | 26-May-1994 | 22(318) |
| 15-Apr-2017 | Rory Thornton | Wales | 16-Mar-1995 | 22(31) |
| 15-Apr-2017 | Dafydd Howells | Wales | 22-Mar-1995 | 22(25) |
| 26-Feb-2017 | Luke Price | Wales | 26-Sep-1995 | 21(154) |
| 10-Feb-2017 | Adam Beard | Wales | 07-Jan-1996 | 21(35) |
| 06-May-2017 | Sam Underhill | England | 22-Jul-1996 | 20(288) |
| 06-May-2017 | Keelan Giles | Wales | 29-Jan-1998 | 19(97) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).