| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 18-Nov-2016 |  Corey Baldwin | Scarlets | Wales | 13-Oct-1999 | 17(37) |
| 11-Nov-2016 | Ryan Conbeer | Scarlets | Wales | 05-Feb-1999 | 17(280) |
| 13-Nov-2016 |  Dane Blacker | Cardiff Blues | Wales | 06-Jul-1998 | 18(131) |
| 04-Nov-2016 |  Tom Curry | Sale Sharks | England | 15-Jun-1998 | 18(143) |
| 04-Nov-2016 | Ben Curry | Sale Sharks | England | 15-Jun-1998 | 18(143) |
| 04-Nov-2016 |  James Newey | Bristol Bears | Ireland | 03-May-1998 | 18(186) |
| 05-Nov-2016 |  Nicholas Isiekwe | Saracens | England | 20-Apr-1998 | 18(200) |
| 28-Jan-2017 |  Jacob Umaga | London Wasps | England | 08-Jul-1998 | 18(205) |
| 11-Nov-2016 | Ioan Nicholas | Scarlets | Wales | 03-Apr-1998 | 18(223) |
| 12-Nov-2016 |  Adam Radwan | Newcastle Falcons | England | 30-Dec-1997 | 18(318) |
| 18-Nov-2016 | Owen Lane | Cardiff Blues | Wales | 20-Dec-1997 | 18(334) |
| 13-Nov-2016 |  William Keast | Exeter Chiefs | England | 24-Nov-1997 | 18(355) |
| 11-Nov-2016 |  James Ratti | Ospreys | Wales | 14-Oct-1997 | 19(28) |
| 04-Nov-2016 | Connor Eastgate | London Wasps | Scotland | 07-Oct-1997 | 19(28) |
| 13-Nov-2016 |  Afeafe Haisila-Lokotui | Worcester Warriors | England | 28-Sep-1997 | 19(46) |
| 13-Nov-2016 | Shane Lewis-Hughes | Cardiff Blues | Wales | 20-Sep-1997 | 19(54) |
| 12-Nov-2016 | Dan Marshall | Newcastle Falcons | England | 11-Aug-1997 | 19(93) |
| 04-Nov-2016 | James Shillcock | Worcester Warriors | England | 01-Aug-1997 | 19(95) |
| 18-Nov-2016 | Phil Jones | Ospreys | Wales | 09-Aug-1997 | 19(101) |
| 04-Nov-2016 | Zac Mercer | Bath | England | 28-Jun-1997 | 19(129) |
| 27-Jan-2017 | Declan Smith | Scarlets | Wales | 14-Sep-1997 | 19(135) |
| 11-Nov-2016 | Matthew Aubrey | Ospreys | Wales | 04-Jun-1997 | 19(160) |
| 05-Nov-2016 |  Joe Mullis | Gloucester | England | 27-Apr-1997 | 19(192) |
| 27-Jan-2017 | Kieron Assiratti | Cardiff Blues | Wales | 30-Jun-1997 | 19(211) |
| 05-Nov-2016 | Jack Maunder | Exeter Chiefs | England | 05-Apr-1997 | 19(214) |
| 13-Nov-2016 | Jack Davies | Cardiff Blues | England | 24-Feb-1997 | 19(262) |
| 04-Nov-2016 | Darren Atkins | Bath | England | 11-Feb-1997 | 19(266) |
| 04-Nov-2016 |  William Evans | Leicester Tigers | England | 28-Jan-1997 | 19(280) |
| 04-Nov-2016 | Jack Willis | London Wasps | England | 24-Dec-1996 | 19(315) |
| 13-Nov-2016 | Joe Simmonds | Exeter Chiefs | England | 19-Dec-1996 | 19(329) |
| 06-Nov-2016 | Callum Chick | Newcastle Falcons | England | 25-Nov-1996 | 19(346) |
| 06-Nov-2016 | Andrew Davidson | Newcastle Falcons | Scotland | 07-Nov-1996 | 19(364) |
| 05-Nov-2016 | Matt Gallagher | Saracens | England | 26-Oct-1996 | 20(10) |
| 11-Nov-2016 | Josh Macleod | Scarlets | Wales | 27-Oct-1996 | 20(15) |
| 27-Jan-2017 | Morgan Sienawski | Cardiff Blues | Wales | 11-Jan-1997 | 20(16) |
| 05-Nov-2016 | Elliott Creed | Gloucester | England | 19-Oct-1996 | 20(17) |
| 27-Jan-2017 | Max Malins | Saracens | England | 07-Jan-1997 | 20(20) |
| 18-Nov-2016 | Leon Brown | Gwent Dragons | Wales | 26-Oct-1996 | 20(23) |
| 05-Nov-2016 | Matthew Protheroe | Gloucester | England | 10-Oct-1996 | 20(26) |
| 04-Nov-2016 | George Worth | Leicester Tigers | England | 08-Oct-1996 | 20(27) |
| 27-Jan-2017 | Rotimi Segun | Saracens | England | 28-Dec-1996 | 20(30) |
| 04-Nov-2016 | Adam Hastings | Bath | Scotland | 05-Oct-1996 | 20(30) |
| 27-Jan-2017 | Teri Morgan-Gee | Cardiff Blues | Wales | 18-Dec-1996 | 20(40) |
| 04-Nov-2016 | Owain James | London Wasps | Wales | 24-Sep-1996 | 20(41) |
| 05-Nov-2016 | Ollie Thorley | Gloucester | England | 11-Sep-1996 | 20(55) |
| 12-Nov-2016 | Brett Connon | Newcastle Falcons | Ireland | 29-Aug-1996 | 20(75) |
| 13-Nov-2016 | Harri Millard | Cardiff Blues | Wales | 17-Aug-1996 | 20(88) |
| 03-Feb-2017 | Billy McBryde | Scarlets | Wales | 24-Oct-1996 | 20(102) |
| 05-Nov-2016 |  Stanley South | Harlequins | England | 24-Jul-1996 | 20(104) |
| 13-Nov-2016 | Jarrod Evans | Cardiff Blues | Wales | 25-Jul-1996 | 20(111) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).