| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 11-Nov-2016 | James Ratti | Wales | 14-Oct-1997 | 19(28) |
| 18-Nov-2016 | Phil Jones | Wales | 09-Aug-1997 | 19(101) |
| 11-Nov-2016 | Matthew Aubrey | Wales | 04-Jun-1997 | 19(160) |
| 18-Nov-2016 | Sam Underhill | England | 22-Jul-1996 | 20(119) |
| 11-Nov-2016 | Joe Thomas | Wales | 21-Feb-1996 | 20(264) |
| 18-Nov-2016 | Adam Beard | Wales | 07-Jan-1996 | 20(316) |
| 11-Nov-2016 | Luke Price | Wales | 26-Sep-1995 | 21(47) |
| 11-Nov-2016 | Dafydd Howells | Wales | 22-Mar-1995 | 21(235) |
| 11-Nov-2016 | Rory Thornton | Wales | 16-Mar-1995 | 21(241) |
| 11-Nov-2016 | Thomas O'Flaherty | England | 21-Jul-1994 | 22(114) |
| 11-Nov-2016 | Scott Otten | Wales | 19-Jul-1994 | 22(116) |
| 18-Nov-2016 | Oliver Cracknell | Wales | 26-May-1994 | 22(177) |
| 11-Nov-2016 | Joe Tomalin-Reeves | Wales | 15-Dec-1993 | 22(332) |
| 11-Nov-2016 | Gareth Thomas | Wales | 02-Aug-1993 | 23(101) |
| 11-Nov-2016 | Dan Baker | Wales | 05-Jul-1992 | 24(129) |
| 18-Nov-2016 | Eli Walker | Wales | 28-Mar-1992 | 24(235) |
| 11-Nov-2016 | Rhodri Jones | Wales | 23-Dec-1991 | 24(324) |
| 28-Jan-2017 | Jay Baker | Wales | 06-Oct-1991 | 25(115) |
| 11-Nov-2016 | Tom Grabham | Wales | 20-Jun-1991 | 25(145) |
| 05-Feb-2017 | Tyler Ardron | Canada | 16-Jun-1991 | 25(235) |
| 28-Jan-2017 | Ben John | Wales | 28-Feb-1991 | 25(335) |
| 28-Jan-2017 | Rhys Webb | Wales | 09-Dec-1988 | 28(50) |
| 11-Nov-2016 | Jonathan Spratt | Wales | 28-Apr-1986 | 30(198) |
| 11-Nov-2016 | Robert McCusker | Wales | 12-Oct-1985 | 31(30) |
| 18-Nov-2016 | Brendon Leonard | New Zealand | 16-Apr-1985 | 31(217) |
| 28-Jan-2017 | Joe Bearman | England | 28-Feb-1979 | 37(335) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).