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Portugal's youngest players during the 1959 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 |
|---|---|---|---|
| Fernando Mendes | 21:304 | 7975 | 16 May 1959v Switzerland |
| José Augusto | 22:32 | 8068 | 16 May 1959v Switzerland |
| Vicente | 23:252 | 8653 | 03 Jun 1959v Scotland |
| Coluna | 23:283 | 8684 | 16 May 1959v Switzerland |
| Augusto Rocha | 24:103 | 8869 | 21 May 1959v Sweden |
| Carlos Duarte | 26:69 | 9566 | 03 Jun 1959v Scotland |
| Cavém | 26:145 | 9642 | 16 May 1959v Switzerland |
| Hernâni | 27:257 | 10119 | 16 May 1959v Switzerland |
| Carrelo Acurcio | 28:66 | 10293 | 21 May 1959v Sweden |
| Antonio Teixeira | 28:242 | 10469 | 16 May 1959v Switzerland |
| Angelo | 29:44 | 10637 | 03 Jun 1959v Scotland |
| Abreu Alfredo | 30:69 | 11027 | 28 Jun 1959v German Democratic Republic |
| Matateu | 31:294 | 11617 | 16 May 1959v Switzerland |
| Raul Figueiredo | 32:85 | 11773 | 03 Jun 1959v Scotland |
| Mendes Virgilio | 32:180 | 11868 | 16 May 1959v Switzerland |