| MD | Players | Clubs | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 17-Aug-2019 |  Ander Barrenetxea | Real Sociedad | Spain | 27-Dec-2001 | 17(233) |
| 17-Aug-2019 |  Iker Losada | Celta Vigo | Spain | 01-Aug-2001 | 18(16) |
| 17-Aug-2019 |  Vinicius Junior | Real Madrid | Brazil | 12-Jul-2000 | 19(35) |
| 16-Aug-2019 |  Oihan Sancet | Athletic Bilbao | Spain | 25-Apr-2000 | 19(112) |
| 17-Aug-2019 |  Ferran Torres | Valencia | Spain | 29-Feb-2000 | 19(169) |
| 17-Aug-2019 |  Samuel Chukwueze | Villarreal | Nigeria | 22-May-1999 | 20(87) |
| 17-Aug-2019 | Fran Beltran | Celta Vigo | Spain | 03-Feb-1999 | 20(195) |
| 17-Aug-2019 | Martin Odegaard | Real Sociedad | Norway | 17-Dec-1998 | 20(243) |
| 17-Aug-2019 |  Oscar Rodriguez | CD Leganes | Spain | 28-Jun-1998 | 21(50) |
| 16-Aug-2019 |  Carles Perez | Barcelona | Spain | 16-Feb-1998 | 21(181) |
| 17-Aug-2019 |  Pervis Estupinan | Osasuna | Ecuador | 21-Jan-1998 | 21(208) |
| 16-Aug-2019 | Carles Alena | Barcelona | Spain | 05-Jan-1998 | 21(223) |
| 17-Aug-2019 | Luka Jovic | Real Madrid | Serbia | 23-Dec-1997 | 21(237) |
| 17-Aug-2019 |  Yan Brice | Granada CF | Cameroon | 26-Aug-1997 | 21(356) |
| 17-Aug-2019 | Aihen Munoz | Real Sociedad | Spain | 16-Aug-1997 | 22(1) |
| 17-Aug-2019 | Pape Cheikh Diop | Celta Vigo | Senegal | 08-Aug-1997 | 22(9) |
| 16-Aug-2019 | Unai Simon | Athletic Bilbao | Spain | 11-Jun-1997 | 22(66) |
| 17-Aug-2019 | Youssef En-Nesyri | CD Leganes | Morocco | 01-Jun-1997 | 22(77) |
| 16-Aug-2019 | Ousmane Dembele | Barcelona | France | 15-May-1997 | 22(93) |
| 16-Aug-2019 | Frenkie de Jong | Barcelona | Netherlands | 12-May-1997 | 22(96) |
| 17-Aug-2019 |  Joan Sastre | RCD Mallorca | Spain | 30-Apr-1997 | 22(109) |
| 17-Aug-2019 | Mikel Oyarzabal | Real Sociedad | Spain | 21-Apr-1997 | 22(118) |
| 17-Aug-2019 | Igor Zubeldia | Real Sociedad | Spain | 30-Mar-1997 | 22(140) |
| 16-Aug-2019 | Unai Nunez | Athletic Bilbao | Spain | 30-Jan-1997 | 22(198) |
| 17-Aug-2019 | Pau Torres | Villarreal | Spain | 16-Jan-1997 | 22(213) |
| 17-Aug-2019 | Brais Mendez | Celta Vigo | Spain | 07-Jan-1997 | 22(222) |
| 17-Aug-2019 | Carlos Soler | Valencia | Spain | 02-Jan-1997 | 22(227) |
| 17-Aug-2019 | Goncalo Guedes | Valencia | Portugal | 29-Nov-1996 | 22(261) |
| 17-Aug-2019 | Robin Le Normand | Real Sociedad | France | 11-Nov-1996 | 22(279) |
| 17-Aug-2019 | Xavi Quintilla | Villarreal | Spain | 23-Aug-1996 | 22(359) |
| 17-Aug-2019 | Lumor | RCD Mallorca | Ghana | 15-Aug-1996 | 23(1) |
| 17-Aug-2019 |  Alvaro Tejero | Eibar | Spain | 20-Jul-1996 | 23(27) |
| 17-Aug-2019 | Rodrigo Tarin | CD Leganes | Spain | 05-Jul-1996 | 23(42) |
| 17-Aug-2019 | Mikel Merino | Real Sociedad | Spain | 22-Jun-1996 | 23(55) |
| 18-Aug-2019 |  Martin Aguirregabiria | CD Alaves | Spain | 10-May-1996 | 23(99) |
| 17-Aug-2019 | Aleix Febas | RCD Mallorca | Spain | 22-Feb-1996 | 23(176) |
| 17-Aug-2019 | Iddrisu Baba | RCD Mallorca | Ghana | 22-Jan-1996 | 23(207) |
| 17-Aug-2019 | Alvaro Odriozola | Real Madrid | Spain | 14-Dec-1995 | 23(246) |
| 17-Aug-2019 | Martin Valjent | RCD Mallorca | Slovakia | 11-Dec-1995 | 23(249) |
| 17-Aug-2019 | Andre-Frank Zambo Anguissa | Villarreal | Cameroon | 16-Nov-1995 | 23(274) |
| 16-Aug-2019 | Unai Lopez | Athletic Bilbao | Spain | 30-Oct-1995 | 23(290) |
| 18-Aug-2019 | Ruben Duarte | CD Alaves | Spain | 18-Oct-1995 | 23(304) |
| 17-Aug-2019 | Ruben Blanco | Celta Vigo | Spain | 25-Jul-1995 | 24(23) |
| 18-Aug-2019 |  Enis Bardhi | Levante | Macedonia | 02-Jul-1995 | 24(47) |
| 16-Aug-2019 | Clement Lenglet | Barcelona | France | 17-Jun-1995 | 24(60) |
| 17-Aug-2019 | David Costas | Celta Vigo | Spain | 26-Mar-1995 | 24(144) |
| 17-Aug-2019 | Domingos Duarte | Granada CF | Portugal | 10-Mar-1995 | 24(160) |
| 17-Aug-2019 | Rober | Eibar | Spain | 16-Feb-1995 | 24(182) |
| 17-Aug-2019 | Adnan Januzaj | Real Sociedad | Belgium | 05-Feb-1995 | 24(193) |
| 17-Aug-2019 | Pione Sisto | Celta Vigo | Denmark | 04-Feb-1995 | 24(194) |
MD = Match date,
DOB = Date Of Birth,
A(D) = Age(Days).