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Belgium's oldest players during the 1965 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 given in days, and in years and days, from their date of birth.
| Player | Age (Y:d) | Age (days) | Match |
|---|---|---|---|
| Frits Vandenboer | 31:25 | 11348 | 02 Jun 1965v Brazil |
| Pierre Hanon | 28:155 | 10382 | 02 Jun 1965v Brazil |
| Jef Jurion | 28:74 | 10301 | 09 May 1965v Israel |
| Paul Van den Berg | 28:52 | 10279 | 02 Dec 1964v France |
| Albert Sulon | 27:60 | 9922 | 02 Jun 1965v Brazil |
| Yves Bare | 26:217 | 9714 | 02 Jun 1965v Brazil |
| Leon Semmeling | 25:149 | 9281 | 02 Jun 1965v Brazil |
| Georges Heylens | 23:298 | 8699 | 02 Jun 1965v Brazil |
| Roger Claessen | 23:249 | 8650 | 02 Jun 1965v Brazil |
| Jean Trappeniers | 22:260 | 8296 | 30 Sep 1964v Netherlands |
| Wilfried Puis | 22:80 | 8116 | 09 May 1965v Israel |
| Paul Van Himst | 21:219 | 7890 | 09 May 1965v Israel |
| Jan Verheyen | 20:272 | 7577 | 07 Apr 1965v Poland |
| Johann Devrindt | 20:169 | 7474 | 30 Sep 1964v Netherlands |