| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 06-May-2017 |  Taufa'ao Filise | Cardiff Blues | Tonga | 26-May-1977 | 39(346) |
| 04-Nov-2016 |  Joe Bearman | Ospreys | England | 28-Feb-1979 | 37(250) |
| 28-Apr-2017 |  Mike Ross | Leinster | Ireland | 21-Dec-1979 | 37(129) |
| 15-Apr-2017 | Gethin Jenkins | Cardiff Blues | Wales | 17-Nov-1980 | 36(149) |
| 06-May-2017 | Matthew Rees | Cardiff Blues | Wales | 09-Dec-1980 | 36(148) |
| 25-Mar-2017 | Corey Flynn | Glasgow Warriors | New Zealand | 05-Jan-1981 | 36(79) |
| 25-Mar-2017 | Sean Lamont | Glasgow Warriors | Scotland | 15-Jan-1981 | 36(69) |
| 11-Mar-2017 | Quintin Geldenhuys | Zebre | Italy | 07-Jun-1981 | 35(278) |
| 06-May-2017 |  Roger Wilson | Ulster | Ireland | 21-Sep-1981 | 35(228) |
| 24-Feb-2017 | Mike McCarthy | Leinster | Ireland | 27-Nov-1981 | 35(90) |
| 06-May-2017 | Hayden Triggs | Leinster | New Zealand | 22-Feb-1982 | 35(74) |
| 06-May-2017 | T Rhys Thomas | Gwent Dragons | Wales | 23-Apr-1982 | 35(14) |
| 25-Mar-2017 | Paul James | Ospreys | Wales | 13-May-1982 | 34(317) |
| 06-May-2017 | Isikeli Nacewa | Leinster | Fiji | 22-Jul-1982 | 34(289) |
| 29-Apr-2017 | Rory Best | Ulster | Ireland | 15-Aug-1982 | 34(258) |
| 06-May-2017 | John Muldoon | Connacht | Ireland | 30-Nov-1982 | 34(158) |
| 06-May-2017 | Tito Tebaldi | Benetton Treviso | Italy | 24-Mar-1983 | 34(44) |
| 26-Nov-2016 | Jayden Hayward | Benetton Treviso | Italy | 30-Nov-1982 | 33(362) |
| 03-Mar-2017 | Franco van der Merwe | Ulster | South Africa | 15-Mar-1983 | 33(354) |
| 29-Oct-2016 | Nick MacLeod | Gwent Dragons | Wales | 22-Mar-1983 | 33(222) |
| 08-Oct-2016 | Robert Kearney | Leinster | Ireland | 26-Mar-1983 | 33(197) |
| 03-Mar-2017 |  Alasdair Dickinson | Edinburgh Rugby | Scotland | 11-Sep-1983 | 33(174) |
| 06-May-2017 | Nick Williams | Cardiff Blues | New Zealand | 02-Dec-1983 | 33(156) |
| 06-May-2017 | Jarrad Hoeata | Cardiff Blues | New Zealand | 12-Dec-1983 | 33(146) |
| 29-Apr-2017 |  Donnacha Ryan | Munster | Ireland | 11-Dec-1983 | 33(140) |
| 03-Mar-2017 | Neil Cochrane | Edinburgh Rugby | England | 04-Jan-1984 | 33(59) |
| 06-May-2017 | Rhian Pienaar | Ulster | South Africa | 10-Mar-1984 | 33(57) |
| 14-Apr-2017 | Valerio Bernabo | Zebre | Italy | 03-Mar-1984 | 33(42) |
| 31-Dec-2016 | James Heaslip | Leinster | Ireland | 15-Dec-1983 | 33(17) |
| 06-May-2017 | Ross Ford | Edinburgh Rugby | Scotland | 23-Apr-1984 | 33(13) |
| 26-Feb-2017 | Tommy Bowe | Ulster | Ireland | 22-Feb-1984 | 33(5) |
| 06-May-2017 | Robert Barbieri | Benetton Treviso | Italy | 05-Jun-1984 | 32(335) |
| 04-Mar-2017 | Sarel Pretorius | Gwent Dragons | South Africa | 18-Apr-1984 | 32(320) |
| 28-Apr-2017 | Zane Kirchner | Leinster | South Africa | 16-Jun-1984 | 32(316) |
| 03-Mar-2017 | Lewis Stevenson | Connacht | Ireland | 01-Jun-1984 | 32(275) |
| 28-Oct-2016 | Alessandro Zanni | Benetton Treviso | Italy | 31-Jan-1984 | 32(271) |
| 03-Dec-2016 | Josh Turnbull | Cardiff Blues | Wales | 12-Mar-1984 | 32(266) |
| 29-Apr-2017 | Brian Mujati | Ospreys | South Africa | 28-Sep-1984 | 32(213) |
| 06-May-2017 | Andrew Trimble | Ulster | Ireland | 20-Oct-1984 | 32(198) |
| 15-Apr-2017 | Chris Henry | Ulster | Ireland | 17-Oct-1984 | 32(180) |
| 06-May-2017 | Dries van Schalkwyk | Zebre | Italy | 21-Dec-1984 | 32(136) |
| 03-Mar-2017 | Ronan Loughney | Connacht | Ireland | 01-Nov-1984 | 32(122) |
| 06-May-2017 | Bradley Davies | Ospreys | Wales | 09-Jan-1985 | 32(117) |
| 06-May-2017 | Juan Harris | Gwent Dragons | South Africa | 22-Feb-1985 | 32(73) |
| 06-May-2017 | Jean Roy Deysel | Munster | South Africa | 05-Mar-1985 | 32(62) |
| 04-Mar-2017 |  Werner Kruger | Scarlets | South Africa | 23-Jan-1985 | 32(40) |
| 01-Jan-2017 | Aled Thomas | Scarlets | Wales | 02-Jan-1985 | 31(365) |
| 26-Feb-2017 | Brendon Leonard | Ospreys | New Zealand | 16-Apr-1985 | 31(316) |
| 03-Mar-2017 | Michael Tagicakibau | Benetton Treviso | Fiji | 09-May-1985 | 31(299) |
| 06-May-2017 | Billy Holland | Munster | Ireland | 03-Aug-1985 | 31(276) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).