| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 04-Jun-2021 | Stephen Myler | England | 21-Jul-1984 | 36(318) |
| 04-Jun-2021 | Bradley Davies | Wales | 09-Jan-1985 | 36(146) |
| 16-May-2021 | Alan Wyn Jones | Wales | 19-Sep-1985 | 35(240) |
| 04-Jun-2021 | Daniel Evans | Wales | 15-Nov-1988 | 32(201) |
| 04-Jun-2021 | Rhys Webb | Wales | 09-Dec-1988 | 32(177) |
| 16-May-2021 | Justin Tipuric | Wales | 06-Aug-1989 | 31(284) |
| 04-Jun-2021 | Tom Botha | South Africa | 31-Aug-1990 | 30(278) |
| 04-Jun-2021 | Sam Parry | Wales | 17-Dec-1991 | 29(170) |
| 04-Jun-2021 | Luke Morgan | Wales | 16-May-1992 | 29(19) |
| 24-Apr-2021 | George North | Wales | 13-Apr-1992 | 29(11) |
| 08-May-2021 | Sam Cross | Wales | 26-Aug-1992 | 28(255) |
| 16-May-2021 | Gareth Thomas | Wales | 02-Aug-1993 | 27(287) |
| 04-Jun-2021 | Nicky Smith | Wales | 07-Apr-1994 | 27(58) |
| 16-May-2021 | Luke Price | Wales | 26-Sep-1995 | 25(233) |
| 04-Jun-2021 | Adam Beard | Wales | 07-Jan-1996 | 25(149) |
| 08-May-2021 | Ifan Phillips | Wales | 29-Jan-1996 | 25(100) |
| 16-May-2021 | Owen Watkin | Wales | 12-Oct-1996 | 24(216) |
| 08-May-2021 | Matthew Protheroe | England | 10-Oct-1996 | 24(210) |
| 16-May-2021 | Kieran Williams | Wales | 12-Apr-1997 | 24(34) |
| 08-May-2021 | Matthew Aubrey | Wales | 04-Jun-1997 | 23(338) |
| 04-Jun-2021 | Ethan Roots | England | 10-Nov-1997 | 23(206) |
| 16-May-2021 | Reuben Morgan-Williams | Wales | 02-Feb-1998 | 23(103) |
| 04-Jun-2021 | Morgan Morris | Wales | 28-Aug-1998 | 22(281) |
| 24-Apr-2021 | Rhys Josh Davies | Wales | 09-Nov-1998 | 22(167) |
| 04-Jun-2021 | Will Griffiths | Wales | 25-Dec-1998 | 22(162) |
| 08-May-2021 | Cai Evans | Wales | 23-Jun-1999 | 21(320) |
| 04-Jun-2021 | Tiaan Thomas-Wheeler | Wales | 19-Nov-1999 | 21(198) |
| 04-Jun-2021 | Dewi Cross | Wales | 06-Dec-1999 | 21(181) |
| 24-Apr-2021 | Josh Thomas | Wales | 30-Jun-2000 | 20(298) |
| 04-Jun-2021 | Joe Hawkins | Wales | 11-Jun-2002 | 18(359) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).