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Portugal's youngest players during the 1968 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 |
|---|---|---|---|
| António Simões | 23:347 | 8748 | 26 Nov 1967v Bulgaria |
| Rui Rodrigues | 24:193 | 8959 | 26 Nov 1967v Bulgaria |
| Manuel Rodrigues | 24:318 | 9084 | 12 Nov 1967v Norway |
| Nóbrega | 25:211 | 9343 | 12 Nov 1967v Norway |
| Eusébio | 25:290 | 9422 | 12 Nov 1967v Norway |
| Jaime Graça | 25:305 | 9437 | 12 Nov 1967v Norway |
| Pedras | 26:27 | 9524 | 26 Nov 1967v Bulgaria |
| José Carlos | 26:50 | 9547 | 12 Nov 1967v Norway |
| Hilário | 28:238 | 10465 | 12 Nov 1967v Norway |
| José Torres | 29:64 | 10657 | 12 Nov 1967v Norway |
| Raul Machado | 30:50 | 11008 | 12 Nov 1967v Norway |
| José Augusto | 30:212 | 11170 | 12 Nov 1967v Norway |
| Coluna | 32:98 | 11786 | 12 Nov 1967v Norway |
| Americo | 34:250 | 12669 | 12 Nov 1967v Norway |