| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 03-Apr-2021 | Keith Earls | Ireland | 02-Oct-1987 | 33(184) |
| 03-Apr-2021 | Stephen Archer | Ireland | 29-Jan-1988 | 33(65) |
| 03-Apr-2021 | Dave Kilcoyne | Ireland | 14-Dec-1988 | 32(110) |
| 03-Apr-2021 | Conor Murray | Ireland | 20-Apr-1989 | 31(349) |
| 19-Dec-2020 | Peter O'Mahony | Ireland | 17-Sep-1989 | 31(94) |
| 03-Apr-2021 | CJ Stander | Ireland | 05-Apr-1990 | 30(364) |
| 13-Dec-2020 | James Cronin | Ireland | 23-Nov-1990 | 30(21) |
| 03-Apr-2021 | Andrew Conway | Ireland | 11-Jul-1991 | 29(267) |
| 13-Dec-2020 | Kevin O'Byrne | Ireland | 16-Apr-1991 | 29(242) |
| 03-Apr-2021 | Damian de Allende | South Africa | 25-Nov-1991 | 29(130) |
| 03-Apr-2021 | Niall Scannell | Ireland | 08-Apr-1992 | 28(360) |
| 03-Apr-2021 | Tadhg Beirne | Ireland | 01-Aug-1992 | 28(245) |
| 19-Dec-2020 | JJ Hanrahan | Ireland | 27-Jul-1992 | 28(145) |
| 19-Dec-2020 | Rhys Marshall | New Zealand | 12-Oct-1992 | 28(68) |
| 03-Apr-2021 | Chris Farrell | Ireland | 16-Mar-1993 | 28(18) |
| 03-Apr-2021 | Jean Kleyn | South Africa | 26-Aug-1993 | 27(220) |
| 03-Apr-2021 | Jack O'Donoghue | Ireland | 08-Jan-1994 | 27(85) |
| 03-Apr-2021 | Michael Haley | Ireland | 28-Jun-1994 | 26(280) |
| 03-Apr-2021 | Joey Carbery | Ireland | 01-Nov-1995 | 25(154) |
| 19-Dec-2020 | Shane Daly | Ireland | 19-Dec-1996 | 24(0) |
| 03-Apr-2021 | Gavin Coombes | Ireland | 11-Dec-1997 | 23(113) |
| 19-Dec-2020 | Josh Wycherley | Ireland | 22-Jul-1999 | 21(151) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).