| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 25-Nov-2017 | Rory Best | Ireland | 15-Aug-1982 | 35(103) |
| 23-Jun-2018 | Robert Kearney | Ireland | 26-Mar-1983 | 35(90) |
| 23-Jun-2018 | Jonathan Sexton | Ireland | 11-Jul-1985 | 32(347) |
| 23-Jun-2018 | Devin Toner | Ireland | 29-Jun-1986 | 31(360) |
| 25-Nov-2017 | Sean O'Brien | Ireland | 14-Feb-1987 | 30(285) |
| 23-Jun-2018 | Keith Earls | Ireland | 02-Oct-1987 | 30(265) |
| 16-Jun-2018 | Cian Healy | Ireland | 07-Oct-1987 | 30(253) |
| 09-Jun-2018 | John Ryan | Ireland | 02-Aug-1988 | 29(311) |
| 23-Jun-2018 | Conor Murray | Ireland | 20-Apr-1989 | 29(64) |
| 23-Jun-2018 | Peter O'Mahony | Ireland | 17-Sep-1989 | 28(279) |
| 23-Jun-2018 | Jack McGrath | Ireland | 11-Oct-1989 | 28(255) |
| 18-Nov-2017 | David Kearney | Ireland | 19-Jun-1989 | 28(152) |
| 23-Jun-2018 | CJ Stander | Ireland | 05-Apr-1990 | 28(79) |
| 23-Jun-2018 | Bundee Aki | Ireland | 07-Apr-1990 | 28(77) |
| 09-Jun-2018 | Robert Herring | Ireland | 27-Apr-1990 | 28(43) |
| 09-Jun-2018 | Jordi Murphy | Ireland | 22-Apr-1991 | 27(48) |
| 18-Nov-2017 | Rhys Ruddock | Ireland | 13-Oct-1990 | 27(36) |
| 16-Jun-2018 | Andrew Conway | Ireland | 11-Jul-1991 | 26(341) |
| 09-Jun-2018 | Iain Henderson | Ireland | 21-Feb-1992 | 26(109) |
| 23-Jun-2018 | Niall Scannell | Ireland | 08-Apr-1992 | 26(76) |
| 23-Jun-2018 | Jack Conan | Ireland | 29-Jul-1992 | 25(329) |
| 18-Nov-2017 | Kieran Marmion | Ireland | 11-Feb-1992 | 25(281) |
| 23-Jun-2018 | Tadhg Furlong | Ireland | 14-Nov-1992 | 25(221) |
| 18-Nov-2017 | Stuart McCloskey | Ireland | 06-Aug-1992 | 25(104) |
| 23-Jun-2018 | Robbie Henshaw | Ireland | 12-Jun-1993 | 25(11) |
| 25-Nov-2017 | Chris Farrell | Ireland | 16-Mar-1993 | 24(254) |
| 18-Nov-2017 | Darren Sweetman | Ireland | 05-May-1993 | 24(197) |
| 16-Jun-2018 | Dan Leavy | Ireland | 23-May-1994 | 24(24) |
| 18-Nov-2017 | Ultan Dilane | Ireland | 09-Nov-1993 | 24(9) |
| 25-Nov-2017 | Adam Byrne | Ireland | 10-Apr-1994 | 23(229) |
| 16-Jun-2018 | Gary Ringrose | Ireland | 26-Jan-1995 | 23(141) |
| 09-Jun-2018 | Joey Carbery | Ireland | 01-Nov-1995 | 22(221) |
| 23-Jun-2018 | Jacob Stockdale | Ireland | 03-Apr-1996 | 22(81) |
| 23-Jun-2018 | James Ryan | Ireland | 24-Jul-1996 | 21(334) |
| 18-Nov-2017 | Andrew Porter | Ireland | 16-Jan-1996 | 21(307) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).