| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 21-Oct-2017 | Schalk Brits | South Africa | 16-May-1981 | 36(158) |
| 01-Apr-2018 | Schalk Burger | South Africa | 13-Apr-1983 | 34(354) |
| 01-Apr-2018 | Richard Wigglesworth | England | 09-Jun-1983 | 34(297) |
| 20-Jan-2018 | Chris Wyles | United States | 13-Sep-1983 | 34(130) |
| 01-Apr-2018 | Marcelo Bosch | Argentina | 07-Jan-1984 | 34(85) |
| 01-Apr-2018 | Bradley Barritt | England | 07-Aug-1986 | 31(237) |
| 13-Jan-2018 | Michael Rhodes | South Africa | 19-Dec-1987 | 30(26) |
| 01-Apr-2018 | Juan Figallo | Argentina | 25-Mar-1988 | 30(7) |
| 01-Apr-2018 | Alex Goode | England | 07-May-1988 | 29(329) |
| 01-Apr-2018 | Sean Maitland | Scotland | 14-Sep-1988 | 29(199) |
| 20-Jan-2018 | Calum Clark | England | 10-Jun-1989 | 28(224) |
| 21-Oct-2017 | Duncan Taylor | Scotland | 05-Sep-1989 | 28(46) |
| 01-Apr-2018 | George Kruis | England | 22-Feb-1990 | 28(38) |
| 20-Jan-2018 | Vincent Koch | South Africa | 13-Mar-1990 | 27(313) |
| 01-Apr-2018 | Jamie George | England | 20-Oct-1990 | 27(163) |
| 01-Apr-2018 | Jackson Wray | England | 10-Nov-1990 | 27(142) |
| 01-Apr-2018 | Makovina Vunipola | England | 13-Jan-1991 | 27(78) |
| 01-Apr-2018 | Liam Williams | Wales | 09-Apr-1991 | 26(358) |
| 01-Apr-2018 | Owen Farrell | England | 21-Sep-1991 | 26(193) |
| 13-Jan-2018 | Will Skelton | Australia | 03-May-1992 | 25(255) |
| 17-Dec-2017 | Ben Spencer | England | 13-Jul-1992 | 25(157) |
| 13-Jan-2018 | Billy Vunipola | England | 03-Nov-1992 | 25(71) |
| 17-Dec-2017 | Alex Lozowski | England | 30-Jun-1993 | 24(170) |
| 01-Apr-2018 | Maro Itoje | England | 28-Oct-1994 | 23(155) |
| 01-Apr-2018 | Nicholas Isiekwe | England | 20-Apr-1998 | 19(346) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).