1930-31 Squad
| NO. | NAME | POS | HEIGHT | WEIGHT | DOB | AGE | BIRTHPLACE | PREFERRED FOOT | |
|---|---|---|---|---|---|---|---|---|---|
 | B. Albéniz | DF | 1/6/1905 | 25 | Eibar | ||||
| | T. Beristáin | GK | 12/6/1904 | 25 | Elgoibar | ||||
| | J. Crespo | MF | 1/14/1907 | 23 | Vitoria-Gasteiz | ||||
| | A. González de Audicana | MF | 4/16/1901 | 29 | Durango | ||||
| | C. Errasti | DF | 8/8/1904 | 26 | Eibar | ||||
| | G. Heredia | FW | 2/13/1913 | 17 | Getxo | ||||
| | R. Ibarraran | FW | 2/28/1909 | 21 | Gernika-Lumo | ||||
| | A. Jáuregui | MF | Barakaldo | ||||||
| | S. Lecue | MF | 2/11/1912 | 18 | Arrigorriaga | ||||
| | J. Francisco López | DF | 7/17/1905 | 25 | Barakaldo | ||||
| | J. Fernández López | FW | 3/30/1908 | 22 | Barakaldo | ||||
| | A. Marcelino | MF | Haro | ||||||
| | J. Marcos | MF | Torrelavega | ||||||
| | A. Mardones | GK | 2/8/1910 | 20 | Tártales de Cilla | ||||
| | J. Ignacio Murúa | FW | 2/12/1910 | 20 | Vitoria-Gasteiz | ||||
| | M. Olivares | FW | 4/2/1909 | 21 | Son Servera | ||||
| | J. Ramón | DF | 3/8/1912 | 18 | Erandio | ||||
| | D. Rey | MF | 5/12/1907 | 23 | Urroz-Villa | ||||
| | D. Germán Saiz | MF | 6/8/1912 | 18 | Molledo | ||||
| | L. Urquiri | MF | 9/1/1906 | 23 | Deba | ||||
| | R. Urreta | GK | 9/30/1912 | 17 | Vitoria-Gasteiz |
