| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 15-Oct-2017 | Nicholas Isiekwe | England | 20-Apr-1998 | 19(178) |
| 15-Oct-2017 | Maro Itoje | England | 28-Oct-1994 | 22(353) |
| 17-Dec-2017 | Alex Lozowski | England | 30-Jun-1993 | 24(170) |
| 13-Jan-2018 | Billy Vunipola | England | 03-Nov-1992 | 25(71) |
| 17-Dec-2017 | Ben Spencer | England | 13-Jul-1992 | 25(157) |
| 11-Dec-2017 | Will Skelton | Australia | 03-May-1992 | 25(222) |
| 15-Oct-2017 | Owen Farrell | England | 21-Sep-1991 | 26(25) |
| 15-Oct-2017 | Liam Williams | Wales | 09-Apr-1991 | 26(190) |
| 15-Oct-2017 | Makovina Vunipola | England | 13-Jan-1991 | 26(276) |
| 15-Oct-2017 | Jackson Wray | England | 10-Nov-1990 | 26(340) |
| 15-Oct-2017 | Jamie George | England | 20-Oct-1990 | 26(361) |
| 15-Oct-2017 | Vincent Koch | South Africa | 13-Mar-1990 | 27(216) |
| 15-Oct-2017 | George Kruis | England | 22-Feb-1990 | 27(235) |
| 21-Oct-2017 | Duncan Taylor | Scotland | 05-Sep-1989 | 28(46) |
| 15-Oct-2017 | Calum Clark | England | 10-Jun-1989 | 28(127) |
| 11-Dec-2017 | Sean Maitland | Scotland | 14-Sep-1988 | 29(88) |
| 15-Oct-2017 | Alex Goode | England | 07-May-1988 | 29(161) |
| 21-Oct-2017 | Juan Figallo | Argentina | 25-Mar-1988 | 29(210) |
| 13-Jan-2018 | Michael Rhodes | South Africa | 19-Dec-1987 | 30(26) |
| 15-Oct-2017 | Bradley Barritt | England | 07-Aug-1986 | 31(70) |
| 15-Oct-2017 | Marcelo Bosch | Argentina | 07-Jan-1984 | 33(282) |
| 15-Oct-2017 | Chris Wyles | United States | 13-Sep-1983 | 34(33) |
| 15-Oct-2017 | Richard Wigglesworth | England | 09-Jun-1983 | 34(129) |
| 11-Dec-2017 | Schalk Burger | South Africa | 13-Apr-1983 | 34(243) |
| 21-Oct-2017 | Schalk Brits | South Africa | 16-May-1981 | 36(158) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).