| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 29-Aug-2020 | Robert Kearney | Ireland | 26-Mar-1983 | 37(157) |
| 22-Aug-2020 | Scott Fardy | Australia | 05-Jul-1984 | 36(48) |
| 22-Aug-2020 | Jonathan Sexton | Ireland | 11-Jul-1985 | 35(43) |
| 29-Aug-2020 | Michael Bent | Ireland | 25-Apr-1986 | 34(127) |
| 29-Aug-2020 | Sean Cronin | Ireland | 06-May-1986 | 34(116) |
| 29-Aug-2020 | Devin Toner | Ireland | 29-Jun-1986 | 34(62) |
| 15-Feb-2020 | Fergus McFaddon | Ireland | 17-Jun-1986 | 33(243) |
| 22-Aug-2020 | Cian Healy | Ireland | 07-Oct-1987 | 32(320) |
| 22-Aug-2020 | David Kearney | Ireland | 19-Jun-1989 | 31(65) |
| 28-Feb-2020 | Joseph Tomane | Australia | 11-Feb-1990 | 30(17) |
| 21-Feb-2020 | Rhys Ruddock | Ireland | 13-Oct-1990 | 29(131) |
| 21-Feb-2020 | James Tracy | Ireland | 02-Apr-1991 | 28(325) |
| 29-Aug-2020 | Jamieson Gibson-Park | Ireland | 10-May-1992 | 28(111) |
| 22-Aug-2020 | James Lowe | Wales | 08-Jul-1992 | 28(45) |
| 22-Aug-2020 | Jack Conan | Ireland | 29-Jul-1992 | 28(24) |
| 22-Aug-2020 | Luke McGrath | Ireland | 03-Feb-1993 | 27(200) |
| 22-Aug-2020 | Josh van der Flier | Ireland | 25-Apr-1993 | 27(119) |
| 22-Aug-2020 | Robbie Henshaw | Ireland | 12-Jun-1993 | 27(71) |
| 04-Jan-2020 | Tadhg Furlong | Ireland | 14-Nov-1992 | 27(50) |
| 29-Aug-2020 | Edward Byrne | Ireland | 09-Sep-1993 | 26(355) |
| 29-Aug-2020 | Rory O'Loughlin | Ireland | 21-Jan-1994 | 26(221) |
| 29-Aug-2020 | Ross Moloney | Ireland | 11-May-1994 | 26(111) |
| 28-Dec-2019 | Adam Byrne | Ireland | 10-Apr-1994 | 25(262) |
| 22-Aug-2020 | Gary Ringrose | Ireland | 26-Jan-1995 | 25(209) |
| 28-Feb-2020 | Peter Dooley | Ireland | 04-Aug-1994 | 25(208) |
| 29-Aug-2020 | Josh Murphy | Ireland | 07-Feb-1995 | 25(204) |
| 21-Feb-2020 | Cian Kelleher | Ireland | 07-Aug-1994 | 25(198) |
| 29-Aug-2020 | Ross Byrne | Ireland | 08-Apr-1995 | 25(144) |
| 22-Aug-2020 | Andrew Porter | Ireland | 16-Jan-1996 | 24(219) |
| 29-Aug-2020 | Will Connors | Ireland | 04-Apr-1996 | 24(147) |
| 29-Aug-2020 | Hugo Keenan | Ireland | 18-Jun-1996 | 24(72) |
| 21-Feb-2020 | Conor O'Brien | Ireland | 06-Feb-1996 | 24(15) |
| 29-Aug-2020 | Max Deegan | Ireland | 01-Oct-1996 | 23(332) |
| 04-Jan-2020 | James Ryan | Ireland | 24-Jul-1996 | 23(163) |
| 28-Feb-2020 | Jimmy O'Brien | Ireland | 27-Nov-1996 | 23(92) |
| 22-Aug-2020 | Jordan Larmour | Ireland | 10-Jun-1997 | 23(73) |
| 28-Dec-2019 | Rowan Osbourne | Ireland | 03-Nov-1996 | 23(54) |
| 29-Aug-2020 | Ciaran Frawley | Ireland | 04-Dec-1997 | 22(269) |
| 29-Aug-2020 | Ronan Kelleher | Ireland | 24-Jan-1998 | 22(218) |
| 22-Aug-2020 | Caelan Doris | Ireland | 02-Apr-1998 | 22(143) |
| 20-Dec-2019 | Tommy O'Brien | Ireland | 20-Feb-1998 | 21(303) |
| 22-Aug-2020 | Ryan Baird | Ireland | 26-Jul-1999 | 21(28) |
| 28-Feb-2020 | Harry Byrne | Ireland | 22-Apr-1999 | 20(312) |
| 21-Feb-2020 | Scott Penny | Ireland | 22-Sep-1999 | 20(152) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).