| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 20-May-2017 | Keelan Giles | Wales | 29-Jan-1998 | 19(111) |
| 29-May-2010 | Daniel Biggar | Wales | 16-Oct-1989 | 20(225) |
| 20-May-2017 | Sam Underhill | England | 22-Jul-1996 | 20(302) |
| 11-May-2012 | Hanno Dirksen | South Africa | 31-Mar-1991 | 21(42) |
| 23-May-2015 | Nicky Smith | Wales | 07-Apr-1994 | 21(46) |
| 14-May-2011 | Justin Tipuric | Wales | 06-Aug-1989 | 21(281) |
| 11-May-2012 | Ashley Beck | Wales | 15-Apr-1990 | 22(27) |
| 14-May-2011 | Rhys Webb | Wales | 09-Dec-1988 | 22(156) |
| 23-May-2015 | Dan Baker | Wales | 05-Jul-1992 | 22(322) |
| 23-May-2015 | Eli Walker | Wales | 28-Mar-1992 | 23(55) |
| 23-May-2015 | Jeff Hassler | Canada | 21-Aug-1991 | 23(275) |
| 23-May-2015 | Tyler Ardron | Canada | 16-Jun-1991 | 23(341) |
| 23-May-2015 | Ben John | Wales | 28-Feb-1991 | 24(84) |
| 23-May-2015 | Josh Matavasi | Fiji | 05-Oct-1990 | 24(230) |
| 29-May-2010 | Alan Wyn Jones | Wales | 19-Sep-1985 | 24(252) |
| 29-May-2010 | Andrew Bishop | Wales | 07-Aug-1985 | 24(295) |
| 29-May-2010 | James Hook | Wales | 27-Jun-1985 | 24(336) |
| 20-May-2017 | Tom Habberfield | Wales | 19-May-1992 | 25(1) |
| 20-May-2017 | Rhodri Jones | Wales | 23-Dec-1991 | 25(149) |
| 29-May-2010 | Tommy Bowe | Ireland | 22-Feb-1984 | 26(97) |
| 27-May-2012 | Tom Smith | Wales | 14-Dec-1985 | 26(165) |
| 23-May-2015 | Daniel Evans | Wales | 15-Nov-1988 | 26(189) |
| 23-May-2015 | Dimitri Arhip | Moldova | 12-Nov-1988 | 26(192) |
| 20-May-2017 | James King | Wales | 24-Jul-1990 | 26(301) |
| 23-May-2015 | Scott Baldwin | Wales | 12-Jul-1988 | 26(315) |
| 29-May-2010 | Huw Bennett | Wales | 11-Jun-1983 | 26(353) |
| 14-May-2011 | Richard Fussell | Wales | 12-Apr-1984 | 27(31) |
| 29-May-2010 | Jonathan Thomas | Wales | 27-Dec-1982 | 27(153) |
| 23-May-2015 | Dan Lydiatt | Wales | 18-Dec-1987 | 27(156) |
| 11-May-2012 | Ian Evans | Wales | 04-Oct-1984 | 27(219) |
| 29-May-2010 | Mike Phillips | Wales | 29-Aug-1982 | 27(273) |
| 29-May-2010 | Paul James | Wales | 13-May-1982 | 28(16) |
| 11-May-2012 | Richard Hibbard | Wales | 13-Dec-1983 | 28(150) |
| 14-May-2011 | Nikki Walker | Scotland | 05-Mar-1982 | 29(70) |
| 29-May-2010 | Ryan Jones | Wales | 13-Mar-1981 | 29(77) |
| 29-May-2010 | Adam Jones | Wales | 08-Mar-1981 | 29(82) |
| 20-May-2017 | Kieron Fonotia | Samoa | 02-Feb-1988 | 29(108) |
| 29-May-2010 | Jerry Collins | New Zealand | 04-Nov-1980 | 29(206) |
| 11-May-2012 | Kahn Fotuali'i | Samoa | 22-May-1982 | 29(355) |
| 29-May-2010 | Lee Byrne | Wales | 01-Jun-1980 | 29(362) |
| 20-May-2017 | Brendon Leonard | New Zealand | 16-Apr-1985 | 32(34) |
| 20-May-2017 | Bradley Davies | Wales | 09-Jan-1985 | 32(131) |
| 11-May-2012 | Joe Bearman | England | 28-Feb-1979 | 33(73) |
| 29-May-2010 | Shane Williams | Wales | 26-Feb-1977 | 33(92) |
| 29-May-2010 | Marty Holah | New Zealand | 10-Sep-1976 | 33(261) |
| 14-May-2011 | Ian Gough | Wales | 10-Nov-1976 | 34(185) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).