| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 28-Apr-2018 | Rory Best | Ireland | 15-Aug-1982 | 35(257) |
| 24-Feb-2018 | Tommy Bowe | Ireland | 22-Feb-1984 | 34(3) |
| 24-Feb-2018 | Andrew Trimble | Ireland | 20-Oct-1984 | 33(127) |
| 21-Apr-2018 | Jean Roy Deysel | South Africa | 05-Mar-1985 | 33(47) |
| 04-Nov-2017 | Chris Henry | Ireland | 17-Oct-1984 | 33(18) |
| 01-Dec-2017 | Paul Marshall | Ireland | 26-Jul-1985 | 32(128) |
| 28-Apr-2018 | Callum Black | England | 25-Feb-1986 | 32(62) |
| 23-Dec-2017 | Robert Diack | Ireland | 12-Nov-1985 | 32(41) |
| 28-Apr-2018 | Louis Ludik | South Africa | 08-Oct-1986 | 31(202) |
| 13-Apr-2018 | Darren Cave | Ireland | 05-Apr-1987 | 31(9) |
| 06-Jan-2018 | Christian Lealiifano | Australia | 24-Sep-1987 | 30(105) |
| 06-Jan-2018 | Peter Browne | England | 25-Oct-1987 | 30(74) |
| 24-Mar-2018 | Wiehahn Herbst | South Africa | 05-Jul-1988 | 29(262) |
| 06-Jan-2018 | Rodney Ah You | Ireland | 27-Oct-1988 | 29(71) |
| 28-Apr-2018 | Sean Reidy | Ireland | 10-May-1989 | 28(353) |
| 28-Apr-2018 | Clive Ross | Ireland | 14-Jun-1989 | 28(318) |
| 21-Apr-2018 | Robert Herring | Ireland | 27-Apr-1990 | 27(359) |
| 21-Apr-2018 | John Cooney | Ireland | 01-May-1990 | 27(355) |
| 24-Nov-2017 | Aaron Hall | Scotland | 25-Sep-1990 | 27(60) |
| 28-Apr-2018 | Luke Marshall | Ireland | 03-Mar-1991 | 27(56) |
| 28-Apr-2018 | Craig Gilroy | Ireland | 11-Mar-1991 | 27(48) |
| 21-Apr-2018 | Andrew Warwick | Ireland | 12-Mar-1991 | 27(40) |
| 01-Dec-2017 | Schalk van der Merwe | South Africa | 04-Dec-1990 | 26(363) |
| 21-Apr-2018 | Charles Piutau | New Zealand | 31-Oct-1991 | 26(173) |
| 01-Sep-2017 | Marcell Coetzee | South Africa | 08-May-1991 | 26(117) |
| 28-Apr-2018 | Iain Henderson | Ireland | 21-Feb-1992 | 26(67) |
| 01-Jan-2018 | Kyle McCall | Ireland | 02-Jan-1992 | 25(365) |
| 28-Apr-2018 | Stuart McCloskey | Ireland | 06-Aug-1992 | 25(265) |
| 28-Apr-2018 | Alan O'Connor | Ireland | 10-Sep-1992 | 25(230) |
| 23-Dec-2017 | Peter Nelson | Canada | 05-Oct-1992 | 25(79) |
| 28-Oct-2017 | Aaron Cairns | Ireland | 07-Oct-1992 | 25(21) |
| 28-Apr-2018 | David Shanahan | Ireland | 20-Jun-1993 | 24(312) |
| 24-Feb-2018 | John Andrew | Ireland | 26-May-1993 | 24(274) |
| 13-Apr-2018 | Matthew Rea | Ireland | 21-Sep-1993 | 24(204) |
| 28-Apr-2018 | Ross Kane | Ireland | 14-Oct-1994 | 23(196) |
| 28-Apr-2018 | Nick Timoney | Ireland | 08-Jan-1995 | 23(110) |
| 21-Apr-2018 | Kieran Treadwell | England | 16-Nov-1995 | 22(157) |
| 28-Apr-2018 | Jacob Stockdale | Ireland | 03-Apr-1996 | 22(25) |
| 01-Jan-2018 | Greg Jones | Ireland | 13-Jan-1996 | 21(354) |
| 28-Apr-2018 | Jonny McPhillips | Ireland | 13-Mar-1997 | 21(46) |
| 09-Feb-2018 | Robert Lyttle | Ireland | 28-Jan-1997 | 21(12) |
| 24-Feb-2018 | Marcus Rea | Ireland | 08-Sep-1997 | 20(169) |
| 06-Jan-2018 | Jonny Stewart | Ireland | 20-Feb-1998 | 19(320) |
| 06-Apr-2018 | Tom O'Toole | Ireland | 23-Sep-1998 | 19(195) |
| 06-Apr-2018 | Matt Dalton | Ireland | 16-Nov-1998 | 19(141) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).