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Spain's youngest players during the 1942 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 |
|---|---|---|---|
| Juan Acuña | 18:317 | 6892 | 28 Dec 1941v Switzerland |
| Guillermo Gorostiza | 32:316 | 12004 | 28 Dec 1941v Switzerland |