| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 14-May-2021 | Ben Healy | Scotland | 29-Jun-1999 | 21(320) |
| 14-May-2021 | Craig Casey | Ireland | 19-Apr-1999 | 22(26) |
| 07-May-2021 | Gavin Coombes | Ireland | 11-Dec-1997 | 23(147) |
| 07-May-2021 | Fineen Wycherley | Ireland | 11-Dec-1997 | 23(147) |
| 11-Jun-2021 | Liam Coombes | Ireland | 01-May-1997 | 24(41) |
| 24-Apr-2021 | Shane Daly | Ireland | 19-Dec-1996 | 24(126) |
| 11-Jun-2021 | Matt Gallagher | England | 26-Oct-1996 | 24(228) |
| 24-Apr-2021 | Joey Carbery | Ireland | 01-Nov-1995 | 25(175) |
| 07-May-2021 | Daniel Goggin | Ireland | 10-Dec-1994 | 26(149) |
| 24-Apr-2021 | Michael Haley | Ireland | 28-Jun-1994 | 26(301) |
| 24-Apr-2021 | Jack O'Donoghue | Ireland | 08-Jan-1994 | 27(106) |
| 07-May-2021 | Rory Scannell | Ireland | 22-Dec-1993 | 27(136) |
| 24-Apr-2021 | Jean Kleyn | South Africa | 26-Aug-1993 | 27(241) |
| 24-Apr-2021 | Chris Farrell | Ireland | 16-Mar-1993 | 28(39) |
| 24-Apr-2021 | Tadhg Beirne | Ireland | 01-Aug-1992 | 28(266) |
| 07-May-2021 | JJ Hanrahan | Ireland | 27-Jul-1992 | 28(284) |
| 24-Apr-2021 | Niall Scannell | Ireland | 08-Apr-1992 | 29(16) |
| 24-Apr-2021 | Damian de Allende | South Africa | 25-Nov-1991 | 29(151) |
| 07-May-2021 | Andrew Conway | Ireland | 11-Jul-1991 | 29(301) |
| 07-May-2021 | Chris Cloete | South Africa | 15-Feb-1991 | 30(82) |
| 14-May-2021 | James Cronin | Ireland | 23-Nov-1990 | 30(173) |
| 24-Apr-2021 | CJ Stander | Ireland | 05-Apr-1990 | 31(20) |
| 24-Apr-2021 | Peter O'Mahony | Ireland | 17-Sep-1989 | 31(220) |
| 24-Apr-2021 | Conor Murray | Ireland | 20-Apr-1989 | 32(4) |
| 24-Apr-2021 | Dave Kilcoyne | Ireland | 14-Dec-1988 | 32(131) |
| 07-May-2021 | John Ryan | Ireland | 02-Aug-1988 | 32(278) |
| 24-Apr-2021 | Stephen Archer | Ireland | 29-Jan-1988 | 33(86) |
| 24-Apr-2021 | Keith Earls | Ireland | 02-Oct-1987 | 33(205) |
| 28-May-2021 | Tommy O'Donnell | Ireland | 21-May-1987 | 34(8) |
| 14-May-2021 | Billy Holland | Ireland | 03-Aug-1985 | 35(285) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).