| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 19-Dec-2020 | Stephen Myler | England | 21-Jul-1984 | 36(151) |
| 03-Apr-2021 | Alan Wyn Jones | Wales | 19-Sep-1985 | 35(197) |
| 12-Dec-2020 | Shaun Venter | South Africa | 16-Mar-1987 | 33(272) |
| 19-Dec-2020 | Dan Lydiatt | Wales | 18-Dec-1987 | 33(2) |
| 03-Apr-2021 | Daniel Evans | Wales | 15-Nov-1988 | 32(139) |
| 03-Apr-2021 | Justin Tipuric | Wales | 06-Aug-1989 | 31(241) |
| 03-Apr-2021 | Ma'afu Fia | Tonga | 22-Nov-1989 | 31(133) |
| 12-Dec-2020 | Lloyd Ashley | Wales | 02-Feb-1991 | 29(314) |
| 03-Apr-2021 | Sam Parry | Wales | 17-Dec-1991 | 29(108) |
| 03-Apr-2021 | George North | Wales | 13-Apr-1992 | 28(355) |
| 19-Dec-2020 | Gareth Thomas | Wales | 02-Aug-1993 | 27(139) |
| 03-Apr-2021 | Nicky Smith | Wales | 07-Apr-1994 | 26(362) |
| 03-Apr-2021 | Luke Price | Wales | 26-Sep-1995 | 25(190) |
| 03-Apr-2021 | Adam Beard | Wales | 07-Jan-1996 | 25(87) |
| 03-Apr-2021 | Owen Watkin | Wales | 12-Oct-1996 | 24(173) |
| 19-Dec-2020 | Matthew Protheroe | England | 10-Oct-1996 | 24(70) |
| 03-Apr-2021 | Kieran Williams | Wales | 12-Apr-1997 | 23(356) |
| 03-Apr-2021 | Keelan Giles | Wales | 29-Jan-1998 | 23(64) |
| 03-Apr-2021 | Reuben Morgan-Williams | Wales | 02-Feb-1998 | 23(60) |
| 03-Apr-2021 | Morgan Morris | Wales | 28-Aug-1998 | 22(219) |
| 03-Apr-2021 | Will Griffiths | Wales | 25-Dec-1998 | 22(100) |
| 19-Dec-2020 | Rhys Josh Davies | Wales | 09-Nov-1998 | 22(41) |
| 12-Dec-2020 | Tiaan Thomas-Wheeler | Wales | 19-Nov-1999 | 21(24) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).