| 2026 | Ander Honrado | 2006 | | |
| 2026 | Jon López Pérez | 2003 | | |
| 2025 | Iñaki Recio | 2000 | 35 | 2 |
| 2025 | Unai GarcésLoan | 2005 | 9 | 1 |
| 2024–2025 | Ander Capa | 1992 | 21 | 0 |
| 2024 | Ander Lorente | 2001 | 25 | 0 |
| 2024–2025 | Asier Arana Sánchez | 1999 | 21 | 1 |
| 2024–2025 | Xabier Cortezon | 1993 | 32 | 6 |
| 2023–2025 | Ager Badiola | 2000 | 61 | 17 |
| 2023–2025 | Aitor Villar | 1991 | 76 | 15 |
| 2023 | Aritz Castro | 1998 | 9 | 0 |
| 2023 | Asier Etxaburu | 1994 | 13 | 3 |
| 2023 | Beñat Garro | 1997 | 16 | 0 |
| 2023–2024 | David Nates | 1999 | 39 | 7 |
| 2023 | Ekhiotz Orobiogoikoetxea | 2002 | 12 | 1 |
| 2023–2025 | Gonzalo Zorrilla | 2001 | 70 | 20 |
| 2023–2025 | Hugo Cabanas | 1990 | 28 | 2 |
| 2023–2025 | Iñigo Arzuaga | 1997 | 57 | 2 |
| 2023–2024 | Iñigo Martin | 1999 | 32 | 9 |
| 2023–2024 | Javier Elías | 2004 | 34 | 1 |
| 2023–2024 | Josu Juste | 2000 | 14 | 1 |
| 2023 | Marcos Jimeno | 1996 | | |
| 2023–2024 | Unai Albizua | 1989 | 14 | 0 |
| 2023 | Unax ÁlvarezLoan | 2002 | 12 | 1 |
| 2023 | Xabier Cardenas | 1998 | 13 | 0 |
| 2022 | Aritz De Miguel | 1999 | 4 | 0 |
| 2022–2023 | Beñat Leiza | 1997 | 23 | 1 |
| 2022–2023 | Ekhi Bravo | 1997 | 20 | 0 |
| 2022–2023 | Eñaut Mendia | 1999 | 25 | 1 |
| 2022–2023 | Iñigo Ibargoien | 1995 | 27 | 2 |
| 2022 | Mikel Álvaro | 1982 | 6 | 1 |
| 2022 | Mikel Gurrutxaga | 1996 | 4 | 0 |
| 2022 | Mikel Murgoitio | 1996 | 3 | 0 |
| 2022 | Quicala Bari | 2002 | 14 | 1 |
| 2022 | Sergio Barcina | 1991 | 1 | 0 |
| 2021–2023 | Aitor Morcillo | 1994 | 60 | 3 |
| 2021–2025 | Aitor Ortega | 1993 | 51 | 8 |
| 2021–2022 | Alexander Iriondo | 1994 | 39 | 3 |
| 2021 | Eneko Eizmendi | 1990 | 14 | 1 |
| 2021–2022 | Jon Urkiza | 1998 | 37 | 5 |
| 2021 | Julen Colinas | 1988 | | |
| 2021 | Oier Garai | 2000 | 6 | 1 |
| 2021–2022 | Xabier Naveira | 1999 | 39 | 5 |
| 2020–2021 | Antonio Salado | 1997 | 29 | 3 |
| 2020 | Esteve Monterde Torrents | 1995 | | |
| 2020–2021 | Ioritz Landeta | 1995 | 4 | 0 |
| 2020–2021 | Javier Murua Alzueta | 1997 | 29 | 1 |
| 2020–2021 | Josu Ibarbia | 1995 | 9 | 0 |
| 2019–2024 | Ander Santamaria | 1995 | 122 | 11 |
| 2019–2020 | Bittor Isuskitza | 1998 | 33 | 4 |
| 2019–2021 | Fernando Rubio García | 1993 | 31 | 0 |
| 2019–2020 | Iñigo Celihueta | 1994 | 33 | 0 |
| 2019–2020 | Javier Alonso EtxebarriaLoan | 1997 | 17 | 0 |
| 2019–2021 | Thaylor Lubanzadio | 1994 | 37 | 4 |
| 2019 | Unai Rementeria Castro | 1999 | 14 | 0 |
| 2018–2019 | Luken Iturrino | 1997 | 2 | 0 |
| 2018–2022 | Txaber Ajuriagoikoa | 1999 | 26 | 0 |
| 2018–2020 | Yaser Hamed | 1997 | 52 | 2 |
| 2017 | Asier Parra CuezvaLoan | 1997 | 16 | 1 |
| 2017 | Iñigo SukiaLoan | 1997 | 4 | 0 |
| 2017–2018 | Josué Dorrio | 1994 | 24 | 5 |
| 2017–2023 | Mikel Cuberia | 1992 | 93 | 10 |
| 2017–2018 | Mikel Méndez | 1985 | | |
| 2016–2017 | Aitor Etxebarriazarraga | 1993 | 20 | 0 |
| 2016–2020 | Ander Artabe | 1993 | 74 | 2 |
| 2016–2019 | David Infante | 1990 | 92 | 10 |
| 2016 | Gorka GiraltLoan | 1995 | 24 | 0 |
| 2016–2018 | Jorge Bengoetxea | 1996 | 41 | 4 |
| 2016–2017 | Mikel Zarrabeitia | 1993 | 27 | 1 |
| 2016 | Oskar Martin | 1984 | 10 | 1 |
| 2016–2017 | Paul Abasolo | 1984 | 22 | 8 |
| 2015–2016 | Adrià Gallego | 1990 | 15 | 2 |
| 2015–2020 | Galder Dwomoh | 1990 | 71 | 16 |
| 2015 | Gerardo Carrera Piñera | 1987 | | |
| 2015 | Igor Engonga | 1995 | | |
| 2015–2016 | Jon Larreategi | 1984 | 37 | 1 |
| 2015 | Julen UriguenLoan | 1995 | 9 | 0 |
| 2015 | Kimmo Hovi | 1994 | | |
| 2015–2016 | Mikel Dañobeitia Martín | 1986 | 11 | 0 |
| 2015–2016 | Victor Monteiro | 1994 | 22 | 0 |
| 2014–2021 | Adrián Guemes | 1993 | 77 | 21 |
| 2014–2016 | Carlos Merino | 1980 | 47 | 3 |
| 2014 | Germán Beltrán | 1979 | | |
| 2014–2015 | Iñaki Olaortua | 1993 | 37 | 2 |
| 2014–2020 | Jon Moya | 1983 | 164 | 7 |
| 2014–2022 | Kevin Calle | 1993 | 69 | 4 |
| 2014–2015 | Manu Busto | 1980 | 23 | 3 |
| 2014–2015 | Xabier Sánchez Bringas | 1978 | 22 | 1 |
| 2013–2016 | Aitor Kortabitarte | 1992 | 90 | 17 |
| 2013 | Asier Salcedo | 1980 | 12 | 0 |
| 2013–2014 | Eneko López de Munain | 1985 | 25 | 1 |
| 2013–2014 | Francisco Javier Cachorro | 1978 | | |
| 2013–2014 | Haritz Albisua | 1992 | 35 | 3 |
| 2013–2014 | Igor Salutregi | 1988 | 35 | 3 |
| 2013–2016 | Xabier Galán Garamendi | 1989 | 94 | 4 |
| 2012–2013 | Ander Vitoria | 1990 | 34 | 24 |
| 2012 | Hodei MendinuetaLoan | 1986 | 1 | 0 |
| 2012–2013 | Jorge Luis García Salmón | 1993 | 28 | 3 |
| 2012–2016 | Josu Etxaniz | 1985 | 117 | 8 |
| 2012–2013 | Oinatz Bilbao | 1985 | 20 | 3 |
| 2012–2022 | Sergio García Salmón | 1990 | 87 | 17 |
| 2011–2012 | Ander Larrea | 1989 | | |
| 2011–2012 | David Asensio López | 1980 | | |
| 2011–2014 | Ibai Rejas García | 1982 | | |
| 2011–2012 | Josetxo Lapoujade Garde | 1988 | | |
| 2011–2013 | Orlando Gutiérrez | 1976 | | |
| 2010–2011 | Gaizka Bergara | 1986 | 32 | 1 |
| 2010–2011 | Gorka Soria Arretxe | 1976 | | |
| 2010–2011 | Imanol Etxabe | 1984 | 32 | 9 |
| 2010–2011 | Marcos Gondra Krug | 1987 | 41 | 5 |
| 2010–2012 | Raúl Salcedo | 1985 | 66 | 23 |
| 2009–2010 | Aimar Cid | 1987 | 30 | 4 |
| 2009–2010 | Álex Quintanilla UrionabarrenetxeaLoan | 1990 | 32 | 0 |
| 2009–2011 | Francisco Javier González Gómez | 1974 | | |
| 2009–2016 | Iker Zarate | 1986 | 123 | 33 |
| 2009–2012 | Javier Iturriaga | 1983 | | |
| 2009–2011 | Xabier Otiñano | 1985 | 61 | 1 |
| 2008–2012 | Imanol Aguiar | 1986 | 112 | 22 |
| 2008–2015 | Kepa del Olmo | 1987 | 81 | 5 |
| 2008–2020 | Urko Vera | 1987 | 42 | 7 |
| 2007–2008 | Eder Martínez Telletxea | 1983 | | |
| 2007–2011 | Eriz Goiria | 1987 | 83 | 1 |
| 2007–2018 | Mikel Garmendia Pajuelo | 1987 | 2 | 0 |
| 2005–2017 | Alfonso Valín | 1985 | 78 | 0 |
| 2005–2006 | Antxón Muneta | 1986 | 29 | 1 |
| 2005–2006 | Jagoba Arrasate | 1978 | 10 | 1 |
| 2003–2006 | Alain Arroyo | 1982 | 53 | 23 |
| 2003–2006 | Txemi Talledo | 1979 | 58 | 0 |
| 2002–2005 | Gorka Bidaurrazaga | 1972 | | |
| 1994–1997 | Javier Etxebarria | 1964 | | |
| 1986–1987 | Josu Anuzita AlegriaLoan | 1964 | 33 | 0 |
| 1967–1968 | Francisco Esteban Aedo | 1938 | | |
| 1916 | Pedro Barturen | 1895 | | |