| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 21-Aug-2020 |  Jayden Hayward | Benetton Treviso | Italy | 30-Nov-1982 | 37(265) |
| 29-Aug-2020 |  Robert Kearney | Leinster | Ireland | 26-Mar-1983 | 37(157) |
| 23-Aug-2020 | Richard Hibbard | Gwent Dragons | Wales | 13-Dec-1983 | 36(254) |
| 09-Nov-2019 | Tito Tebaldi | Benetton Treviso | Italy | 24-Mar-1983 | 36(230) |
| 21-Aug-2020 | Alessandro Zanni | Benetton Treviso | Italy | 31-Jan-1984 | 36(203) |
| 30-Aug-2020 |  Josh Turnbull | Cardiff Blues | Wales | 12-Mar-1984 | 36(171) |
| 22-Aug-2020 | Scott Fardy | Leinster | Australia | 05-Jul-1984 | 36(48) |
| 30-Aug-2020 | Stephen Myler | Ospreys | England | 21-Jul-1984 | 36(40) |
| 03-Jan-2020 | Nick Williams | Cardiff Blues | New Zealand | 02-Dec-1983 | 36(32) |
| 01-Mar-2020 | Schalk Ferreira | Southern Kings | South Africa | 09-Feb-1984 | 36(21) |
| 29-Feb-2020 | Rhian Pienaar | Cheetahs | South Africa | 10-Mar-1984 | 35(356) |
| 30-Aug-2020 | Bradley Davies | Ospreys | Wales | 09-Jan-1985 | 35(234) |
| 23-Aug-2020 | Juan Harris | Gwent Dragons | South Africa | 22-Feb-1985 | 35(183) |
| 22-Aug-2020 | Jonathan Sexton | Leinster | Ireland | 11-Jul-1985 | 35(43) |
| 29-Feb-2020 |  Werner Kruger | Scarlets | South Africa | 23-Jan-1985 | 35(37) |
| 22-Aug-2020 |  Billy Holland | Munster | Ireland | 03-Aug-1985 | 35(20) |
| 30-Aug-2020 | Alan Wyn Jones | Ospreys | Wales | 19-Sep-1985 | 34(346) |
| 29-Aug-2020 | Michael Bent | Leinster | Ireland | 25-Apr-1986 | 34(127) |
| 29-Aug-2020 | Sean Cronin | Leinster | Ireland | 06-May-1986 | 34(116) |
| 22-Aug-2020 |  Willem Petrus Nel | Edinburgh Rugby | Scotland | 30-Apr-1986 | 34(115) |
| 30-Nov-2019 | Tom McCartney | Connacht | New Zealand | 06-Sep-1985 | 34(85) |
| 29-Aug-2020 | Devin Toner | Leinster | Ireland | 29-Jun-1986 | 34(62) |
| 26-Oct-2019 | Petrus Johannes Juandre Kruger | Scarlets | South Africa | 06-Sep-1985 | 34(50) |
| 01-Nov-2019 | George Fabio Biagi | Zebre | Italy | 04-Oct-1985 | 34(28) |
| 15-Feb-2020 | Reynold Lee-lo | Cardiff Blues | Samoa | 28-Feb-1986 | 33(352) |
| 09-Nov-2019 | Alby Mathewson | Munster | New Zealand | 13-Dec-1985 | 33(331) |
| 23-Aug-2020 |  Louis Ludik | Ulster | South Africa | 08-Oct-1986 | 33(320) |
| 14-Feb-2020 | Daniel Van Der Merwe | Glasgow Warriors | Canada | 28-Apr-1986 | 33(292) |
| 29-Feb-2020 | Aaron Jarvis | Gwent Dragons | Wales | 20-May-1986 | 33(285) |
| 21-Aug-2020 | Alberto Sgarbi | Benetton Treviso | Italy | 26-Nov-1986 | 33(269) |
| 15-Feb-2020 | Fergus McFaddon | Leinster | Ireland | 17-Jun-1986 | 33(243) |
| 29-Aug-2020 | Ken Owens | Scarlets | Wales | 03-Jan-1987 | 33(239) |
| 23-Feb-2020 | Rhys Gill | Cardiff Blues | Wales | 30-Oct-1986 | 33(116) |
| 04-Jan-2020 | John Barclay | Edinburgh Rugby | Scotland | 24-Sep-1986 | 33(102) |
| 22-Aug-2020 | Tommy O'Donnell | Munster | Ireland | 21-May-1987 | 33(94) |
| 28-Feb-2020 | Tim Swinson | Glasgow Warriors | Scotland | 11-Feb-1987 | 33(17) |
| 06-Mar-2020 | Ian Keatley | Benetton Treviso | Ireland | 01-Apr-1987 | 32(340) |
| 30-Aug-2020 | Keith Earls | Munster | Ireland | 02-Oct-1987 | 32(333) |
| 22-Aug-2020 | Cian Healy | Leinster | Ireland | 07-Oct-1987 | 32(320) |
| 30-Nov-2019 | Shaun Venter | Ospreys | South Africa | 16-Mar-1987 | 32(259) |
| 02-Nov-2019 | Marc Jones | Scarlets | Wales | 03-Apr-1987 | 32(213) |
| 29-Feb-2020 | Aaron Shingler | Scarlets | Wales | 07-Aug-1987 | 32(206) |
| 22-Aug-2020 | Stephen Archer | Munster | Ireland | 29-Jan-1988 | 32(206) |
| 26-Oct-2019 | Tom James | Scarlets | Wales | 17-Apr-1987 | 32(192) |
| 29-Aug-2020 | Sione Kalamafoni | Scarlets | Tonga | 18-May-1988 | 32(103) |
| 15-Feb-2020 | Filo Paulo | Cardiff Blues | Samoa | 06-Nov-1987 | 32(101) |
| 11-Oct-2019 | Lewis Evans | Gwent Dragons | Wales | 09-Jul-1987 | 32(94) |
| 21-Aug-2020 | Dewaldt Otto Duvenage | Benetton Treviso | South Africa | 22-May-1988 | 32(91) |
| 03-Jan-2020 | Hadleigh Parkes | Scarlets | Wales | 05-Oct-1987 | 32(90) |
| 04-Jan-2020 | Robin Copeland | Connacht | Ireland | 23-Oct-1987 | 32(73) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).