| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 01-Feb-2019 |  Romain Ntamack | France | France | 01-May-1999 | 19(276) |
| 02-Feb-2019 |  Tom Curry | England | England | 15-Jun-1998 | 20(232) |
| 10-Feb-2019 | Demba Bamba | France | France | 17-Mar-1998 | 20(330) |
| 09-Mar-2019 | Joe Cokanasiga | England | England | 15-Nov-1997 | 21(114) |
| 09-Feb-2019 |  Aaron Wainwright | Wales | Wales | 25-Sep-1997 | 21(137) |
| 16-Mar-2019 |  Marco Zanon | Italy | Italy | 03-Oct-1997 | 21(164) |
| 09-Mar-2019 |  Darcy Graham | Scotland | Scotland | 21-Jun-1997 | 21(261) |
| 10-Mar-2019 |  Jordan Larmour | Ireland | Ireland | 10-Jun-1997 | 21(273) |
| 16-Mar-2019 | Gregory Alldritt | France | France | 23-Mar-1997 | 21(358) |
| 02-Feb-2019 | Blair Kinghorn | Scotland | Scotland | 18-Jan-1997 | 22(15) |
| 23-Feb-2019 | Antoine Dupont | France | France | 15-Nov-1996 | 22(100) |
| 09-Feb-2019 | Owen Watkin | Wales | Wales | 12-Oct-1996 | 22(120) |
| 01-Feb-2019 | Damian Penaud | France | France | 25-Sep-1996 | 22(129) |
| 02-Feb-2019 | Jamie Ritchie | Scotland | Scotland | 16-Aug-1996 | 22(170) |
| 02-Feb-2019 | James Ryan | Ireland | Ireland | 24-Jul-1996 | 22(193) |
| 02-Feb-2019 | Jacob Stockdale | Ireland | Ireland | 03-Apr-1996 | 22(305) |
| 01-Feb-2019 | Adam Beard | Wales | Wales | 07-Jan-1996 | 23(25) |
| 16-Mar-2019 | Jake Polledri | Italy | Italy | 08-Nov-1995 | 23(128) |
| 23-Feb-2019 | Magnus Bradbury | Scotland | Scotland | 23-Aug-1995 | 23(184) |
| 23-Feb-2019 | Thomas Ramos | France | France | 23-Jul-1995 | 23(215) |
| 01-Feb-2019 | Josh Adams | Wales | Wales | 21-Apr-1995 | 23(286) |
| 02-Feb-2019 | Sam Skinner | Scotland | England | 31-Jan-1995 | 24(2) |
| 02-Feb-2019 | Gary Ringrose | Ireland | Ireland | 26-Jan-1995 | 24(7) |
| 09-Mar-2019 | Ellis Genge | England | England | 16-Feb-1995 | 24(21) |
| 01-Feb-2019 | Tomos Williams | Wales | Wales | 01-Jan-1995 | 24(31) |
| 02-Feb-2019 | Maro Itoje | England | England | 28-Oct-1994 | 24(97) |
| 24-Feb-2019 | Federico Ruzza | Italy | Italy | 04-Aug-1994 | 24(204) |
| 02-Feb-2019 | Sebastian Negri | Italy | Italy | 30-Jun-1994 | 24(217) |
| 16-Mar-2019 | Tizano Pasquali | Italy | Italy | 14-Jul-1994 | 24(245) |
| 10-Feb-2019 | Yacouba Camara | France | France | 02-Jun-1994 | 24(253) |
| 01-Feb-2019 | Arthur Iturria | France | France | 13-May-1994 | 24(264) |
| 01-Feb-2019 | Ross Moriarty | Wales | Wales | 18-Apr-1994 | 24(289) |
| 09-Feb-2019 | Nicky Smith | Wales | Wales | 07-Apr-1994 | 24(308) |
| 02-Feb-2019 | Simone Ferrari | Italy | Italy | 28-Mar-1994 | 24(311) |
| 10-Feb-2019 | Gael Fickou | France | France | 26-Mar-1994 | 24(321) |
| 09-Feb-2019 | Jonny Gray | Scotland | Scotland | 14-Mar-1994 | 24(332) |
| 09-Feb-2019 | Elliott Dee | Wales | Wales | 07-Mar-1994 | 24(339) |
| 23-Feb-2019 | Felix Lambey | France | France | 15-Mar-1994 | 24(345) |
| 02-Feb-2019 | Huw Jones | Scotland | Scotland | 17-Dec-1993 | 25(47) |
| 24-Feb-2019 | Ultan Dilane | Ireland | Ireland | 09-Nov-1993 | 25(107) |
| 02-Feb-2019 | Sam Johnson | Scotland | Scotland | 19-Jun-1993 | 25(228) |
| 02-Feb-2019 | Angelo Esposito | Italy | Italy | 14-Jun-1993 | 25(233) |
| 02-Feb-2019 | Robbie Henshaw | Ireland | Ireland | 12-Jun-1993 | 25(235) |
| 09-Feb-2019 | Edoardo Padovani | Italy | Italy | 15-May-1993 | 25(270) |
| 02-Feb-2019 | Tommaso Allan | Italy | Italy | 26-Apr-1993 | 25(282) |
| 02-Feb-2019 | Josh van der Flier | Ireland | Ireland | 25-Apr-1993 | 25(283) |
| 02-Feb-2019 | Jack Nowell | England | England | 11-Apr-1993 | 25(297) |
| 09-Mar-2019 | Ali Price | Scotland | Scotland | 12-May-1993 | 25(301) |
| 02-Feb-2019 | Kyle Sinckler | England | England | 30-Mar-1993 | 25(309) |
| 02-Feb-2019 | Henry Slade | England | England | 19-Mar-1993 | 25(320) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).