| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 18-Oct-2008 | Daniel Biggar | Wales | 16-Oct-1989 | 19(2) |
| 15-Jan-2016 | Sam Underhill | England | 22-Jul-1996 | 19(176) |
| 15-Oct-2017 | Keelan Giles | Wales | 29-Jan-1998 | 19(259) |
| 22-Jan-2012 | Eli Walker | Wales | 28-Mar-1992 | 19(299) |
| 18-Oct-2008 | Rhys Webb | Wales | 09-Dec-1988 | 19(313) |
| 16-Nov-2019 | Tiaan Thomas-Wheeler | Wales | 19-Nov-1999 | 19(362) |
| 13-Dec-2013 | Sam Davies | Wales | 06-Oct-1993 | 20(68) |
| 16-Nov-2019 | Cai Evans | Wales | 23-Jun-1999 | 20(146) |
| 10-Jan-2004 | Richard Pugh | Wales | 10-Aug-1983 | 20(153) |
| 11-Dec-2022 | Joe Hawkins | Wales | 11-Jun-2002 | 20(183) |
| 12-Dec-2003 | Huw Bennett | Wales | 11-Jun-1983 | 20(184) |
| 19-Oct-2014 | Nicky Smith | Wales | 07-Apr-1994 | 20(195) |
| 23-Jan-2022 | Harri Deaves | Wales | 13-Jun-2001 | 20(224) |
| 15-Nov-2015 | Dafydd Howells | Wales | 22-Mar-1995 | 20(238) |
| 13-Jan-2013 | Tom Habberfield | Wales | 19-May-1992 | 20(239) |
| 05-Dec-2004 | Matthew Jones | Wales | 04-Apr-1984 | 20(245) |
| 08-Dec-2012 | Ross Jones | Wales | 11-Jan-1992 | 20(332) |
| 07-Dec-2003 | Jonathan Thomas | Wales | 27-Dec-1982 | 20(345) |
| 15-Oct-2017 | Owen Watkin | Wales | 12-Oct-1996 | 21(3) |
| 23-Oct-2004 | David Bishop | Wales | 22-Sep-1983 | 21(32) |
| 12-Dec-2009 | Gareth Owen | Wales | 05-Nov-1988 | 21(37) |
| 11-Dec-2005 | Ian Evans | Wales | 04-Oct-1984 | 21(68) |
| 20-Oct-2006 | Andrew Bishop | Wales | 07-Aug-1985 | 21(74) |
| 16-Nov-2019 | Morgan Morris | Wales | 28-Aug-1998 | 21(80) |
| 09-Dec-2006 | Alan Wyn Jones | Wales | 19-Sep-1985 | 21(81) |
| 09-Dec-2006 | James Hook | Wales | 27-Jun-1985 | 21(165) |
| 22-Jan-2011 | Justin Tipuric | Wales | 06-Aug-1989 | 21(169) |
| 12-Oct-2012 | Hanno Dirksen | South Africa | 31-Mar-1991 | 21(196) |
| 23-Jan-2022 | Josh Thomas | Wales | 30-Jun-2000 | 21(207) |
| 12-Nov-2011 | Ashley Beck | Wales | 15-Apr-1990 | 21(211) |
| 20-Jan-2013 | Tom Grabham | Wales | 20-Jun-1991 | 21(215) |
| 15-Jan-2005 | Richie Rees | Wales | 21-May-1983 | 21(240) |
| 21-Oct-2017 | Adam Beard | Wales | 07-Jan-1996 | 21(288) |
| 20-Jan-2013 | Ben John | Wales | 28-Feb-1991 | 21(327) |
| 10-Jan-2004 | Gavin Henson | Wales | 01-Feb-1982 | 21(343) |
| 20-Jan-2013 | Lloyd Peers | Wales | 02-Feb-1991 | 21(353) |
| 15-Jan-2022 | Jac Morgan | Wales | 21-Jan-2000 | 21(360) |
| 20-Jan-2006 | Richard Hibbard | Wales | 13-Dec-1983 | 22(39) |
| 12-Dec-2003 | Luke Tait | Canada | 26-Oct-1981 | 22(47) |
| 20-Oct-2013 | Jeff Hassler | Canada | 21-Aug-1991 | 22(61) |
| 20-Jan-2013 | Sam Lewis | Wales | 11-Nov-1990 | 22(71) |
| 19-Oct-2014 | Dan Baker | Wales | 05-Jul-1992 | 22(106) |
| 08-Dec-2012 | James King | Wales | 24-Jul-1990 | 22(138) |
| 31-Jan-2004 | Matthew Brayley | Wales | 08-Sep-1981 | 22(145) |
| 06-Dec-2013 | Tyler Ardron | Canada | 16-Jun-1991 | 22(174) |
| 23-Nov-2019 | Kieran Williams | Wales | 12-Apr-1997 | 22(225) |
| 15-Jan-2022 | Dewi Lake | Wales | 16-May-1999 | 22(245) |
| 15-Jan-2005 | Paul James | Wales | 13-May-1982 | 22(248) |
| 07-Dec-2003 | Adam Jones | Wales | 08-Mar-1981 | 22(274) |
| 31-Jan-2004 | Andrew Lloyd | England | 09-Apr-1981 | 22(297) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).