| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 19-Mar-2021 |  Jayden Hayward | Benetton Treviso | Italy | 30-Nov-1982 | 38(110) |
| 28-Mar-2021 | Richard Hibbard | Gwent Dragons | Wales | 13-Dec-1983 | 37(106) |
| 22-Mar-2021 |  Josh Turnbull | Cardiff Blues | Wales | 12-Mar-1984 | 37(10) |
| 19-Mar-2021 |  Scott Fardy | Leinster | Australia | 05-Jul-1984 | 36(257) |
| 07-Mar-2021 | Stephen Myler | Ospreys | England | 21-Jul-1984 | 36(229) |
| 28-Mar-2021 | Juan Harris | Gwent Dragons | South Africa | 22-Feb-1985 | 36(34) |
| 15-Nov-2020 | Bradley Davies | Ospreys | Wales | 09-Jan-1985 | 35(311) |
| 03-Oct-2020 |  Werner Kruger | Scarlets | South Africa | 23-Jan-1985 | 35(254) |
| 12-Mar-2021 |  Billy Holland | Munster | Ireland | 03-Aug-1985 | 35(222) |
| 23-Jan-2021 | Jonathan Sexton | Leinster | Ireland | 11-Jul-1985 | 35(197) |
| 13-Mar-2021 |  Alby Mathewson | Ulster | New Zealand | 13-Dec-1985 | 35(91) |
| 22-Mar-2021 | Reynold Lee-lo | Cardiff Blues | Samoa | 28-Feb-1986 | 35(23) |
| 10-Oct-2020 | Alan Wyn Jones | Ospreys | Wales | 19-Sep-1985 | 35(22) |
| 19-Mar-2021 | Michael Bent | Leinster | Ireland | 25-Apr-1986 | 34(329) |
| 19-Mar-2021 | Sean Cronin | Leinster | Ireland | 06-May-1986 | 34(318) |
| 23-Jan-2021 |  Willem Petrus Nel | Edinburgh Rugby | Scotland | 30-Apr-1986 | 34(269) |
| 19-Mar-2021 | Devin Toner | Leinster | Ireland | 29-Jun-1986 | 34(264) |
| 05-Dec-2020 | Aaron Jarvis | Gwent Dragons | Wales | 20-May-1986 | 34(200) |
| 22-Mar-2021 | Rhys Gill | Cardiff Blues | Wales | 30-Oct-1986 | 34(144) |
| 21-Mar-2021 | Jamie Roberts | Gwent Dragons | Wales | 08-Nov-1986 | 34(134) |
| 27-Mar-2021 | Alberto Sgarbi | Benetton Treviso | Italy | 26-Nov-1986 | 34(122) |
| 02-Nov-2020 | Louis Ludik | Ulster | South Africa | 08-Oct-1986 | 34(26) |
| 22-Mar-2021 | Marc Jones | Scarlets | Wales | 03-Apr-1987 | 33(354) |
| 03-Oct-2020 | Ken Owens | Scarlets | Wales | 03-Jan-1987 | 33(274) |
| 04-Dec-2020 | Ian Keatley | Benetton Treviso | Ireland | 01-Apr-1987 | 33(248) |
| 15-Nov-2020 | Shaun Venter | Ospreys | South Africa | 16-Mar-1987 | 33(245) |
| 22-Mar-2021 | Aaron Shingler | Scarlets | Wales | 07-Aug-1987 | 33(228) |
| 15-Nov-2020 | Tommy O'Donnell | Munster | Ireland | 21-May-1987 | 33(179) |
| 23-Jan-2021 | Keith Earls | Munster | Ireland | 02-Oct-1987 | 33(114) |
| 23-Jan-2021 | Cian Healy | Leinster | Ireland | 07-Oct-1987 | 33(109) |
| 12-Mar-2021 | Stephen Archer | Munster | Ireland | 29-Jan-1988 | 33(43) |
| 24-Jan-2021 | Dan Lydiatt | Ospreys | Wales | 18-Dec-1987 | 33(38) |
| 12-Mar-2021 | Leone Nakarawa | Glasgow Warriors | Fiji | 02-Apr-1988 | 32(344) |
| 09-Jan-2021 | Jim Tuivaiti | Zebre | New Zealand | 01-Feb-1988 | 32(343) |
| 28-Mar-2021 | Lee-Roy Atalifo | Edinburgh Rugby | Fiji | 10-May-1988 | 32(322) |
| 22-Mar-2021 | Sione Kalamafoni | Scarlets | Tonga | 18-May-1988 | 32(308) |
| 19-Mar-2021 | Dewaldt Otto Duvenage | Benetton Treviso | South Africa | 22-May-1988 | 32(301) |
| 22-Jan-2021 | Jon Davies | Scarlets | Wales | 05-Apr-1988 | 32(292) |
| 27-Mar-2021 | Lee Jones | Glasgow Warriors | Scotland | 28-Jun-1988 | 32(272) |
| 26-Feb-2021 | John Ryan | Munster | Ireland | 02-Aug-1988 | 32(208) |
| 19-Mar-2021 | Ian Nagle | Zebre | Ireland | 17-Oct-1988 | 32(153) |
| 23-Nov-2020 | Tommy Seymour | Glasgow Warriors | Scotland | 01-Jul-1988 | 32(145) |
| 22-Mar-2021 | Dimitri Arhip | Cardiff Blues | Moldova | 12-Nov-1988 | 32(130) |
| 19-Mar-2021 | Daniel Evans | Ospreys | Wales | 15-Nov-1988 | 32(124) |
| 27-Feb-2021 | Phil Price | Scarlets | Wales | 10-Nov-1988 | 32(109) |
| 07-Mar-2021 | Rhys Webb | Ospreys | Wales | 09-Dec-1988 | 32(88) |
| 22-Mar-2021 | Jason Harries | Cardiff Blues | Wales | 14-Feb-1989 | 32(36) |
| 22-Jan-2021 | Leigh Halfpenny | Scarlets | Wales | 22-Dec-1988 | 32(31) |
| 13-Mar-2021 | Matthew Healy | Connacht | Ireland | 14-Mar-1989 | 31(365) |
| 06-Mar-2021 | Ian Madigan | Ulster | Ireland | 21-Mar-1989 | 31(350) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).