| MD | Players | Club | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 28-Apr-2018 |  Jordan Petaia | Queensland Reds | Australia | 14-Mar-2000 | 18(45) |
| 12-May-2018 | Semisa Tupou | Melbourne Rebels | Australia | 29-Apr-1999 | 19(13) |
| 05-May-2018 | Caleb Clarke | Blues | New Zealand | 29-Mar-1999 | 19(37) |
| 24-Feb-2018 | Robert Valetini | Brumbies | Australia | 03-Sep-1998 | 19(174) |
| 17-Feb-2018 | Damian Willemse | Western Stormers | South Africa | 07-May-1998 | 19(286) |
| 13-Jul-2018 | Tata McDermott | Queensland Reds | Australia | 18-Sep-1998 | 19(298) |
| 26-May-2018 | Harrison Hockings | Queensland Reds | Australia | 29-Jul-1998 | 19(301) |
| 28-Apr-2018 | Hamish Stewart | Queensland Reds | Australia | 03-Mar-1998 | 20(56) |
| 31-Mar-2018 | Hendre Stassen | Bulls | South Africa | 29-Dec-1997 | 20(92) |
| 02-Mar-2018 | Liam Wright | Queensland Reds | Australia | 06-Nov-1997 | 20(116) |
| 18-May-2018 | Peter Umaga-Jensen | Hurricanes | New Zealand | 31-Dec-1997 | 20(138) |
| 01-Apr-2018 | Hacjivah Dayimani | Lions | South Africa | 23-Sep-1997 | 20(190) |
| 20-Apr-2018 | Dalton Papali'i | Blues | New Zealand | 11-Oct-1997 | 20(191) |
| 14-Jul-2018 | Thomas Umaga-Jensen | Highlanders | New Zealand | 31-Dec-1997 | 20(195) |
| 26-May-2018 | Marino Mikaele Tu'u | Highlanders | New Zealand | 06-Nov-1997 | 20(201) |
| 03-Mar-2018 | Marcos Kremer | Jaguares | Argentina | 30-Jul-1997 | 20(216) |
| 26-May-2018 | Josh Mckay | Highlanders | New Zealand | 10-Oct-1997 | 20(228) |
| 07-Jul-2018 | Ruben van Heerden | Bulls | South Africa | 27-Oct-1997 | 20(253) |
| 02-Mar-2018 | Tiaan Falcon | Chiefs | New Zealand | 19-Jun-1997 | 20(256) |
| 10-Mar-2018 | Curwin Bosch | Sharks | South Africa | 25-Jun-1997 | 20(258) |
| 02-Jun-2018 | Jayden Ngamanu | Queensland Reds | Australia | 29-Aug-1997 | 20(277) |
| 17-Mar-2018 | Len Massyn | Lions | South Africa | 21-May-1997 | 20(300) |
| 24-Feb-2018 | Bautista Delguy | Jaguares | Argentina | 22-Apr-1997 | 20(308) |
| 19-May-2018 | Immanuel Libbok | Bulls | South Africa | 15-Jul-1997 | 20(308) |
| 01-Apr-2018 | Michael Tambwe | Lions | South Africa | 12-May-1997 | 20(324) |
| 17-Mar-2018 | Angus Scott-Young | Queensland Reds | Australia | 23-Apr-1997 | 20(328) |
| 14-Apr-2018 | Izaia Perese | Queensland Reds | Australia | 17-May-1997 | 20(332) |
| 23-Mar-2018 | Embrose Papier | Bulls | South Africa | 25-Apr-1997 | 20(332) |
| 23-Feb-2018 | Reiko Ioane | Blues | New Zealand | 18-Mar-1997 | 20(342) |
| 03-Mar-2018 | Jordie Barrett | Hurricanes | New Zealand | 17-Feb-1997 | 21(14) |
| 04-May-2018 | Luke Jacobson | Chiefs | New Zealand | 20-Apr-1997 | 21(14) |
| 23-Feb-2018 | Jack Maddocks | Melbourne Rebels | Australia | 05-Feb-1997 | 21(18) |
| 31-Mar-2018 | Stephen Perofeta | Blues | New Zealand | 12-Mar-1997 | 21(19) |
| 23-Feb-2018 | Jordan Uelese | Melbourne Rebels | Australia | 24-Jan-1997 | 21(30) |
| 14-Apr-2018 | Orbyn Leger | Blues | Samoa | 13-Mar-1997 | 21(32) |
| 17-Feb-2018 | Cobus Wiese | Western Stormers | South Africa | 02-Jan-1997 | 21(46) |
| 24-Feb-2018 | Shaun Stevenson | Chiefs | New Zealand | 14-Nov-1996 | 21(102) |
| 23-Mar-2018 | Manasa Mataele | Crusaders | Fiji | 27-Nov-1996 | 21(116) |
| 24-Mar-2018 | Alex Mafi | Queensland Reds | Australia | 07-Nov-1996 | 21(137) |
| 23-Feb-2018 | Lukhan Lealaiaulolo-Tui | Queensland Reds | Australia | 19-Sep-1996 | 21(157) |
| 23-Feb-2018 | Izack Rodda | Queensland Reds | Australia | 20-Aug-1996 | 21(187) |
| 04-May-2018 | Alex Nankivell | Chiefs | New Zealand | 25-Oct-1996 | 21(191) |
| 21-Apr-2018 | Quinten Strange | Crusaders | New Zealand | 21-Aug-1996 | 21(243) |
| 10-Mar-2018 | Sam Nock | Blues | New Zealand | 18-Jun-1996 | 21(265) |
| 24-Mar-2018 | Marco Janse van Vuuren | Lions | South Africa | 14-Jun-1996 | 21(283) |
| 23-Feb-2018 | James Tuttle | Queensland Reds | Australia | 13-May-1996 | 21(286) |
| 23-Feb-2018 | Taniela Tupou | Queensland Reds | Tonga | 10-May-1996 | 21(289) |
| 05-May-2018 | Sio Tomkinson | Highlanders | New Zealand | 27-May-1996 | 21(343) |
| 24-Feb-2018 | Divan Rossouw | Bulls | South Africa | 12-Mar-1996 | 21(349) |
| 24-Mar-2018 | Tyrel Lomax | Highlanders | New Zealand | 16-Mar-1996 | 22(8) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).