| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 20-May-2017 | Keelan Giles | Wales | 29-Jan-1998 | 19(111) |
| 20-May-2017 | Sam Underhill | England | 22-Jul-1996 | 20(302) |
| 20-May-2017 | Nicky Smith | Wales | 07-Apr-1994 | 23(43) |
| 20-May-2017 | Tom Habberfield | Wales | 19-May-1992 | 25(1) |
| 20-May-2017 | Rhodri Jones | Wales | 23-Dec-1991 | 25(149) |
| 20-May-2017 | James King | Wales | 24-Jul-1990 | 26(301) |
| 20-May-2017 | Ashley Beck | Wales | 15-Apr-1990 | 27(35) |
| 20-May-2017 | Daniel Biggar | Wales | 16-Oct-1989 | 27(216) |
| 20-May-2017 | Justin Tipuric | Wales | 06-Aug-1989 | 27(287) |
| 20-May-2017 | Daniel Evans | Wales | 15-Nov-1988 | 28(186) |
| 20-May-2017 | Scott Baldwin | Wales | 12-Jul-1988 | 28(312) |
| 20-May-2017 | Kieron Fonotia | Samoa | 02-Feb-1988 | 29(108) |
| 20-May-2017 | Alan Wyn Jones | Wales | 19-Sep-1985 | 31(244) |
| 20-May-2017 | Brendon Leonard | New Zealand | 16-Apr-1985 | 32(34) |
| 20-May-2017 | Bradley Davies | Wales | 09-Jan-1985 | 32(131) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).