1930-31 Squad
| NO. | NAME | POS | HEIGHT | WEIGHT | DOB | AGE | BIRTHPLACE | PREFERRED FOOT | |
|---|---|---|---|---|---|---|---|---|---|
 | M. Heliodoro Álvarez | FW | 3/26/1908 | 22 | Torre del Bierzo | ||||
| | N. Arana | DF | 12/18/1908 | 21 | Ordizia | ||||
| | E. Arrizabalo | DF | 8/3/1910 | 20 | Deba | ||||
| | M. Ayestaran | MF | 9/29/1910 | 19 | Pasaia | ||||
| | C. Bienzobas | FW | 11/28/1906 | 23 | Donostia/San Sebastián | ||||
| | F. Bienzobas | FW | 3/26/1909 | 21 | Donostia/San Sebastián | ||||
| | B. Ecenarro | FW | 1/21/1909 | 21 | Donostia/San Sebastián | ||||
| | F. Elzo | GK | 10/4/1909 | 20 | Beasain | ||||
| | J. Luis Enatarriaga | MF | 6/1/1909 | 21 | Donostia/San Sebastián | ||||
| | E. Garmendia | FW | 8/8/1905 | 25 | Errenteria | ||||
| | I. María Hermoso | FW | 1.76 m | 12/13/1906 | 23 | Tolosa | |||
| | F. Ilundain | DF | 8/22/1908 | 22 | Pamplona | ||||
| | J. Izaguirre | GK | 4/13/1906 | 24 | Tolosa | ||||
| | A. Labarta | MF | 3/31/1905 | 25 | Pasaia | ||||
| | D. López | DF | Tolosa | ||||||
| | M. Marculeta | MF | 9/24/1907 | 22 | Donostia/San Sebastián | ||||
| | Á. Mariscal | FW | 8/11/1904 | 26 | Donostia/San Sebastián | ||||
| | N. Oyaneder | FW | 11/26/1908 | 21 | Donostia/San Sebastián | ||||
| | M. Prado | FW | 2/4/1914 | 16 | Tolosa |
