| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 27-Jan-2018 |  Donncha O'Callaghan | Worcester Warriors | Ireland | 24-Mar-1979 | 38(310) |
| 17-Nov-2017 |  Gethin Jenkins | Cardiff Blues | Wales | 17-Nov-1980 | 37(0) |
| 30-Mar-2018 |  Kai Horstmann | Exeter Chiefs | England | 21-Sep-1981 | 36(190) |
| 04-Nov-2017 |  Petrus Du Plessis | London Irish | England | 31-May-1981 | 36(157) |
| 11-Nov-2017 |  Scott Lawson | Newcastle Falcons | Scotland | 28-Sep-1981 | 36(44) |
| 11-Mar-2018 | Nili Latu | Newcastle Falcons | Tonga | 19-Feb-1982 | 36(20) |
| 02-Feb-2018 | Damian Welch | Cardiff Blues | Wales | 28-Jul-1982 | 35(190) |
| 04-Feb-2018 |  Michele Rizzo | Leicester Tigers | Italy | 16-Sep-1982 | 35(142) |
| 11-Mar-2018 | Allister Hogg | Newcastle Falcons | Scotland | 20-Jan-1983 | 35(51) |
| 27-Jan-2018 |  Luke Charteris | Bath | Wales | 09-Mar-1983 | 34(325) |
| 02-Feb-2018 | Franco van der Merwe | London Irish | South Africa | 15-Mar-1983 | 34(325) |
| 03-Feb-2018 | Thomas Waldron | Exeter Chiefs | England | 28-Apr-1983 | 34(282) |
| 30-Mar-2018 | James Wilson | Bath | New Zealand | 07-Jul-1983 | 34(267) |
| 27-Jan-2018 | Elvis Taione | Exeter Chiefs | Tonga | 25-May-1983 | 34(248) |
| 03-Feb-2018 | Greg Holmes | Exeter Chiefs | Australia | 11-Jun-1983 | 34(238) |
| 02-Feb-2018 |  Christian Day | Northampton Saints | England | 24-Jun-1983 | 34(224) |
| 02-Feb-2018 | David Paice | London Irish | England | 24-Nov-1983 | 34(71) |
| 26-Jan-2018 |  Richard Hibbard | Gloucester | Wales | 13-Dec-1983 | 34(45) |
| 11-Nov-2017 | John Afoa | Gloucester | New Zealand | 16-Oct-1983 | 34(27) |
| 11-Nov-2017 | Ben White | Cardiff Blues | Wales | 23-Nov-1983 | 33(354) |
| 11-Mar-2018 | Vereniki Goneva | Newcastle Falcons | Fiji | 05-Apr-1984 | 33(340) |
| 02-Feb-2018 | Josh Turnbull | Cardiff Blues | Wales | 12-Mar-1984 | 33(327) |
| 02-Feb-2018 | Ben Franks | London Irish | New Zealand | 27-Mar-1984 | 33(312) |
| 02-Feb-2018 | Ofisa Treviranus | London Irish | Samoa | 31-Mar-1984 | 33(308) |
| 09-Mar-2018 | Stephen Myler | Northampton Saints | England | 21-Jul-1984 | 33(231) |
| 02-Feb-2018 | Zane Kirchner | Gwent Dragons | South Africa | 16-Jun-1984 | 33(231) |
| 30-Mar-2018 | Moray Low | Exeter Chiefs | Scotland | 28-Nov-1984 | 33(122) |
| 02-Feb-2018 |  Bryn Evans | Sale Sharks | New Zealand | 28-Oct-1984 | 33(97) |
| 09-Mar-2018 | Campese Ma'afu | Northampton Saints | Fiji | 19-Dec-1984 | 33(80) |
| 02-Feb-2018 |  Mark Lambert | Harlequins | England | 19-Feb-1985 | 32(348) |
| 03-Feb-2018 | Jeremy Thrush | Gloucester | New Zealand | 19-Apr-1985 | 32(290) |
| 11-Nov-2017 | Sam Dickinson | Northampton Saints | England | 28-Jan-1985 | 32(287) |
| 03-Feb-2018 | Phil Dollman | Exeter Chiefs | Wales | 15-May-1985 | 32(264) |
| 02-Feb-2018 | James Horwill | Harlequins | Australia | 29-May-1985 | 32(249) |
| 09-Mar-2018 | Ben Foden | Northampton Saints | England | 22-Jul-1985 | 32(230) |
| 11-Mar-2018 | Maxime Mermoz | Newcastle Falcons | France | 28-Jul-1985 | 32(226) |
| 02-Feb-2018 | James Hook | Ospreys | Wales | 27-Jun-1985 | 32(220) |
| 04-Nov-2017 |  James Haskell | London Wasps | England | 02-Apr-1985 | 32(216) |
| 11-Mar-2018 | Toby Flood | Newcastle Falcons | England | 08-Aug-1985 | 32(215) |
| 10-Nov-2017 | Paul Doran-Jones | London Wasps | England | 02-May-1985 | 32(192) |
| 11-Nov-2017 | Michael Paterson | Northampton Saints | New Zealand | 09-May-1985 | 32(186) |
| 11-Mar-2018 | Sinoti Sinoti | Newcastle Falcons | Samoa | 09-Sep-1985 | 32(183) |
| 27-Jan-2018 |  Dominic Day | Saracens | Wales | 22-Aug-1985 | 32(158) |
| 10-Nov-2017 | Daniel Tuohy | Leicester Tigers | Ireland | 18-Jun-1985 | 32(145) |
| 30-Mar-2018 | Julian Salvi | Exeter Chiefs | Australia | 09-Nov-1985 | 32(141) |
| 02-Feb-2018 | Alafoti Faosilivia | Worcester Warriors | Samoa | 28-Oct-1985 | 32(97) |
| 04-Feb-2018 | Matt Smith | Leicester Tigers | England | 15-Nov-1985 | 32(81) |
| 30-Mar-2018 | David Dennis | Exeter Chiefs | Australia | 10-Jan-1986 | 32(79) |
| 04-Nov-2017 | Brendan McKibbin | London Irish | Australia | 19-Sep-1985 | 32(46) |
| 03-Feb-2018 | Kieran Longbottom | Saracens | Australia | 20-Dec-1985 | 32(45) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).