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Spain's youngest players during the 1930 season, and their age in years and days on the occasion of their final appearance, starting or coming on as a substitute.
For each player age is measured in days, and in years and days, from their date of birth to the day of their first appearance.
| Player | Age (Y:d) | Age (days) | Match |
|---|---|---|---|
| José Muguerza | 18:272 | 6847 | 14 Jun 1930v Czechoslovakia |
| Guillermo Gorostiza | 21:118 | 7789 | 14 Jun 1930v Czechoslovakia |
| Luis Regueiro | 21:355 | 8026 | 22 Jun 1930v Italy |
| Crisanto Bosch | 22:6 | 8042 | 01 Jan 1930v Czechoslovakia |
| Gaspar Rubio | 22:18 | 8054 | 01 Jan 1930v Czechoslovakia |
| Martí Ventolrà | 23:188 | 8589 | 22 Jun 1930v Italy |
| Jacinto Fernandez Quincoces | 24:168 | 8934 | 01 Jan 1930v Czechoslovakia |
| Ciriaco Errasti | 25:145 | 9277 | 01 Jan 1930v Czechoslovakia |
| Ricardo Zamora | 28:345 | 10572 | 01 Jan 1930v Czechoslovakia |