Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 04/2018 |  | Ruly García | GK |  | Celta de Vigo U19 | Celta de Vigo U19 |
| 01/2018 | | Pol Roigé | MF |  | RCD Mallorca | Mallorca |
| 01/2018 | | Álex Serrano | MF | | RCD Mallorca | Mallorca |
| 01/2018 |  | Din Alomerovic | DF |  | CF Fuenlabrada | Fuenlabrada |
| 01/2018 |  | Franco Lobos | FW | |||
| 11/2017 | | Fran Vieites | GK |  | Celta de Vigo | Celta de Vigo |
| 10/2017 | | Sergio Carreira | DF | | Celta de Vigo U19 | Celta de Vigo U19 |
| 08/2017 | | Tià Sastre | MF |  | RCD Mallorca B | Mallorca |
| 07/2017 | | Jerónimo Lario | GK |  | FC Jumilla | FC Jumilla |
| 07/2017 | | Rai Marchán | MF |  | Valladolid Promesas | Valladolid B |
| 07/2017 | | Dani Sotres | GK |  | Levante UD B | Levante B |
| 07/2017 | | Víctor Pastrana | MF |  | AD Alcorcón | Alcorcón |
| 07/2017 | | Diego Pampín | DF | | Celta de Vigo | Celta de Vigo |
| 07/2017 |  | Riki Mangana | DF | | Celta de Vigo U19 | Celta de Vigo U19 |
| 07/2017 | | Aarón Rey | MF | | Celta de Vigo U19 | Celta de Vigo U19 |
| 07/2017 |  | Dejan Drazič | MF |  | Real Valladolid | Valladolid |
| 07/2017 | | Juan Antonio Ros | MF |  | FC Cartagena | Cartagena |
| 07/2017 |  | Dennis Eckert-Ayensa | FW |  | Bor. Mönchengladbach II | M'gladbach II |
| 07/2017 |  | Marcos André | FW |  | UD Logroñés | UD Logroñés |
| 07/2017 | | Rubén Albés | MA | | Valladolid Promesas | Valladolid B |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2018 | | Iván Villar | GK |  | Levante UD | Levante |
| 08/2017 | | Mera | MF |  | Racing Ferrol | Racing Ferrol |
| 07/2017 | | Ángel Fraga | GK |  | CCD Cerceda | CCD Cerceda |
| 07/2017 | | Samu Araújo | DF |  | FC Barcelona B | Barcelona B |
| 07/2017 | | Marcos André | FW | | UD Logroñés | UD Logroñés |
| 07/2017 | | Borja Iglesias | FW |  | Real Zaragoza | Zaragoza |
| 07/2017 | | Néstor Díaz | GK |  | CD Badajoz | CD Badajoz |
| 07/2017 | | Adri Castellano | DF |  | Recreativo Granada | Recre Granada |
| 07/2017 | | Roger Riera | DF |  | Villarreal CF B | Villarreal B |
| 07/2017 | | Borja Fernández | MF |  | CF Reus Deportiu | Reus Deportiu |
| 07/2017 |  | Pape Cheikh Diop | MF | | Celta de Vigo | Celta de Vigo |
| 07/2017 |  | Gus Ledes | MF | | CF Reus Deportiu | Reus Deportiu |
| 07/2017 | | Hicham | FW |  | UD Almería | Almería |
| 07/2017 | | João Camacho | FW |  | CD Nacional | CD Nacional |