| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 01-Jan-2018 | Calvin Nash | Ireland | 08-Aug-1997 | 20(146) |
| 01-Sep-2017 | Sean O'Connor | Ireland | 22-Aug-1996 | 21(10) |
| 26-Nov-2017 | Sam Arnold | Ireland | 08-Apr-1996 | 21(232) |
| 01-Sep-2017 | Liam O'Connor | Ireland | 13-Jul-1995 | 22(51) |
| 17-Feb-2018 | Stephen Fitzgerald | Ireland | 13-Nov-1995 | 22(97) |
| 06-Jan-2018 | Conor Oliver | Ireland | 21-Sep-1995 | 22(108) |
| 01-Sep-2017 | Alex Wootton | Ireland | 07-Jul-1994 | 23(56) |
| 10-Feb-2018 | Daniel Goggin | Ireland | 10-Dec-1994 | 23(62) |
| 01-Sep-2017 | Jack O'Donoghue | Ireland | 08-Jan-1994 | 23(236) |
| 22-Sep-2017 | Rory Scannell | Ireland | 22-Dec-1993 | 23(274) |
| 01-Sep-2017 | Jean Kleyn | South Africa | 26-Aug-1993 | 24(6) |
| 01-Sep-2017 | Darren Sweetman | Ireland | 05-May-1993 | 24(119) |
| 01-Sep-2017 | Chris Farrell | Ireland | 16-Mar-1993 | 24(169) |
| 01-Sep-2017 | Rhys Marshall | New Zealand | 12-Oct-1992 | 24(324) |
| 10-Feb-2018 | Brian Scott | Ireland | 09-Mar-1993 | 24(338) |
| 01-Jan-2018 | Darren O'Shea | Ireland | 12-Dec-1992 | 25(20) |
| 07-Oct-2017 | JJ Hanrahan | Ireland | 27-Jul-1992 | 25(72) |
| 30-Sep-2017 | Niall Scannell | Ireland | 08-Apr-1992 | 25(175) |
| 17-Feb-2018 | Gerbrandt Grobler | South Africa | 06-Feb-1992 | 26(12) |
| 01-Sep-2017 | Andrew Conway | Ireland | 11-Jul-1991 | 26(53) |
| 26-Nov-2017 | James Hart | Ireland | 28-Jul-1991 | 26(122) |
| 01-Sep-2017 | Jacob Johannes Taute | South Africa | 21-Mar-1991 | 26(165) |
| 26-Dec-2017 | Kevin O'Byrne | Ireland | 16-Apr-1991 | 26(255) |
| 03-Nov-2017 | Chris Cloete | South Africa | 15-Feb-1991 | 26(262) |
| 01-Jan-2018 | James Cronin | Ireland | 23-Nov-1990 | 27(39) |
| 01-Sep-2017 | Tyler Bleyedaal | New Zealand | 31-May-1990 | 27(93) |
| 30-Sep-2017 | CJ Stander | Ireland | 05-Apr-1990 | 27(178) |
| 27-Oct-2017 | Simon Zebo | Ireland | 16-Mar-1990 | 27(225) |
| 30-Sep-2017 | Peter O'Mahony | Ireland | 17-Sep-1989 | 28(13) |
| 23-Feb-2018 | Dave O'Callaghan | Ireland | 12-Jan-1990 | 28(42) |
| 27-Oct-2017 | Mark Flanagan | Ireland | 02-Aug-1989 | 28(86) |
| 30-Sep-2017 | Conor Murray | Ireland | 20-Apr-1989 | 28(163) |
| 17-Feb-2018 | Ronan O'Mahony | Ireland | 28-May-1989 | 28(265) |
| 30-Sep-2017 | Dave Kilcoyne | Ireland | 14-Dec-1988 | 28(290) |
| 30-Sep-2017 | John Ryan | Ireland | 02-Aug-1988 | 29(59) |
| 01-Sep-2017 | Stephen Archer | Ireland | 29-Jan-1988 | 29(216) |
| 16-Mar-2018 | Mike Sherry | Ireland | 18-Jun-1988 | 29(271) |
| 30-Sep-2017 | Robin Copeland | Ireland | 23-Oct-1987 | 29(343) |
| 07-Oct-2017 | Keith Earls | Ireland | 02-Oct-1987 | 30(6) |
| 01-Sep-2017 | Tommy O'Donnell | Ireland | 21-May-1987 | 30(104) |
| 09-Sep-2017 | Ian Keatley | Ireland | 01-Apr-1987 | 30(162) |
| 01-Sep-2017 | Duncan Williams | Ireland | 17-Apr-1986 | 31(138) |
| 01-Sep-2017 | Billy Holland | Ireland | 03-Aug-1985 | 32(29) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).