| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 13-Oct-2017 | Jacob Stockdale | Ireland | 03-Apr-1996 | 21(193) |
| 13-Oct-2017 | Kieran Treadwell | England | 16-Nov-1995 | 21(332) |
| 10-Dec-2017 | Nick Timoney | Ireland | 08-Jan-1995 | 22(337) |
| 13-Jan-2018 | Matthew Rea | Ireland | 21-Sep-1993 | 24(114) |
| 22-Oct-2017 | Alan O'Connor | Ireland | 10-Sep-1992 | 25(42) |
| 13-Oct-2017 | Stuart McCloskey | Ireland | 06-Aug-1992 | 25(68) |
| 13-Oct-2017 | Iain Henderson | Ireland | 21-Feb-1992 | 25(235) |
| 13-Oct-2017 | Kyle McCall | Ireland | 02-Jan-1992 | 25(285) |
| 13-Oct-2017 | Charles Piutau | New Zealand | 31-Oct-1991 | 25(348) |
| 13-Oct-2017 | Luke Marshall | Ireland | 03-Mar-1991 | 26(225) |
| 10-Dec-2017 | Craig Gilroy | Ireland | 11-Mar-1991 | 26(275) |
| 13-Oct-2017 | John Cooney | Ireland | 01-May-1990 | 27(165) |
| 13-Oct-2017 | Robert Herring | Ireland | 27-Apr-1990 | 27(169) |
| 13-Oct-2017 | Sean Reidy | Ireland | 10-May-1989 | 28(156) |
| 13-Jan-2018 | Rodney Ah You | Ireland | 27-Oct-1988 | 29(78) |
| 13-Oct-2017 | Wiehahn Herbst | South Africa | 05-Jul-1988 | 29(100) |
| 13-Oct-2017 | Christian Lealiifano | Australia | 24-Sep-1987 | 30(20) |
| 22-Oct-2017 | Darren Cave | Ireland | 05-Apr-1987 | 30(201) |
| 13-Oct-2017 | Louis Ludik | South Africa | 08-Oct-1986 | 31(6) |
| 22-Oct-2017 | Callum Black | England | 25-Feb-1986 | 31(239) |
| 13-Oct-2017 | Robert Diack | Ireland | 12-Nov-1985 | 31(336) |
| 22-Oct-2017 | Paul Marshall | Ireland | 26-Jul-1985 | 32(88) |
| 13-Oct-2017 | Jean Roy Deysel | South Africa | 05-Mar-1985 | 32(222) |
| 22-Oct-2017 | Andrew Trimble | Ireland | 20-Oct-1984 | 33(2) |
| 22-Oct-2017 | Chris Henry | Ireland | 17-Oct-1984 | 33(5) |
| 22-Oct-2017 | Tommy Bowe | Ireland | 22-Feb-1984 | 33(243) |
| 13-Jan-2018 | Rory Best | Ireland | 15-Aug-1982 | 35(152) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).