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Bulgaria'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 |
|---|---|---|---|
| Hristo Bonev | 20:247 | 7552 | 08 Oct 1967v USSR |
| Simeon Simeonov | 21:199 | 7870 | 12 Nov 1967v Sweden |
| Milko Gaydarski | 21:203 | 7874 | 08 Oct 1967v USSR |
| Dimitar Penev | 22:87 | 8123 | 08 Oct 1967v USSR |
| Petar Zhekov | 22:362 | 8398 | 08 Oct 1967v USSR |
| Georgi Popov | 23:85 | 8486 | 08 Oct 1967v USSR |
| Ivan Davidov | 24:52 | 8818 | 26 Nov 1967v Portugal |
| Vassil Mitkov | 24:56 | 8822 | 12 Nov 1967v Sweden |
| Georgi Asparoukov | 24:192 | 8958 | 12 Nov 1967v Sweden |
| Dobromir Zhechev | 24:330 | 9096 | 08 Oct 1967v USSR |
| Stancho Bonchev | 25:159 | 9291 | 08 Oct 1967v USSR |
| Todor Kolev | 25:196 | 9328 | 12 Nov 1967v Sweden |
| Borislav Gaganelov | 26:0 | 9497 | 08 Oct 1967v USSR |
| Aleksandar Shalamanov | 26:68 | 9565 | 12 Nov 1967v Sweden |
| Dimitar Yakimov | 26:87 | 9584 | 08 Oct 1967v USSR |
| Dinko Dermendjiev | 26:127 | 9624 | 08 Oct 1967v USSR |
| Nikola Kotkov | 28:338 | 10565 | 12 Nov 1967v Sweden |
| Ivan Dimitrov | 32:147 | 11835 | 08 Oct 1967v USSR |