| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 14-Jan-2018 | William Evans | England | 28-Jan-1997 | 20(351) |
| 14-Jan-2018 | George Worth | England | 08-Oct-1996 | 21(98) |
| 14-Jan-2018 | Charlie Thacker | England | 10-Aug-1996 | 21(157) |
| 14-Oct-2017 | Ellis Genge | England | 16-Feb-1995 | 22(241) |
| 14-Jan-2018 | Harry Thacker | England | 18-Feb-1994 | 23(330) |
| 21-Oct-2017 | Valentino Mapapalangi | Tonga | 18-Jul-1993 | 24(95) |
| 14-Jan-2018 | Harry Wells | England | 29-Sep-1993 | 24(107) |
| 14-Oct-2017 | Dominic Barrow | England | 19-Mar-1993 | 24(209) |
| 14-Oct-2017 | Nick Malouf | Australia | 19-Mar-1993 | 24(209) |
| 14-Oct-2017 | George Ford | England | 16-Mar-1993 | 24(212) |
| 14-Oct-2017 | Luke Hamilton | Scotland | 07-Jan-1992 | 25(281) |
| 14-Oct-2017 | Mike Williams | England | 04-Nov-1991 | 25(345) |
| 17-Dec-2017 | Manu Tuilagi | England | 18-May-1991 | 26(214) |
| 14-Oct-2017 | Telusa Veainu | Tonga | 26-Dec-1990 | 26(293) |
| 14-Jan-2018 | Tom Brady | England | 10-Feb-1991 | 26(339) |
| 14-Oct-2017 | Jonny May | England | 01-Apr-1990 | 27(196) |
| 14-Jan-2018 | Joe Ford | England | 04-Jun-1990 | 27(224) |
| 14-Jan-2018 | Dominic Ryan | Ireland | 28-May-1990 | 27(231) |
| 14-Jan-2018 | Sam Harrison | England | 07-Apr-1990 | 27(282) |
| 14-Oct-2017 | Matt Toomua | Australia | 02-Jan-1990 | 27(285) |
| 14-Oct-2017 | Graham Kitchener | England | 29-Sep-1989 | 28(15) |
| 14-Oct-2017 | Ben Youngs | England | 05-Sep-1989 | 28(39) |
| 14-Jan-2018 | Greg Bateman | England | 20-Jun-1989 | 28(208) |
| 21-Oct-2017 | Gareth Owen | Wales | 05-Nov-1988 | 28(350) |
| 14-Oct-2017 | Sione Kalamafoni | Tonga | 18-May-1988 | 29(149) |
| 09-Dec-2017 | Adam Thompstone | England | 04-Sep-1987 | 30(97) |
| 14-Oct-2017 | Dan Cole | England | 09-May-1987 | 30(159) |
| 14-Oct-2017 | Tom Youngs | England | 28-Jan-1987 | 30(260) |
| 09-Dec-2017 | Michael Fitzgerald | New Zealand | 08-Feb-1987 | 30(305) |
| 14-Jan-2018 | Patric Cilliers | South Africa | 03-Mar-1987 | 30(318) |
| 09-Dec-2017 | Kyle Traynor | Scotland | 27-Feb-1986 | 31(286) |
| 09-Dec-2017 | Matthew Tait | England | 06-Feb-1986 | 31(307) |
| 14-Oct-2017 | Matt Smith | England | 15-Nov-1985 | 31(334) |
| 21-Jan-2018 | Tatafu Polota Nau | Australia | 26-Jul-1985 | 32(179) |
| 21-Jan-2018 | Brendan O'Connor | New Zealand | 31-May-1983 | 34(236) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).