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Belgium's oldest players during the 1977 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 |
|---|---|---|---|
| Raoul Lambert | 32:21 | 11709 | 10 Nov 1976v Northern Ireland |
| Erwin Vandendaele | 31:327 | 11650 | 26 Jan 1977v Italy |
| Julien Cools | 30:41 | 10999 | 26 Mar 1977v Netherlands |
| Jacques Teugels | 30:33 | 10991 | 05 Sep 1976v Iceland |
| Christian Piot | 29:171 | 10764 | 26 Mar 1977v Netherlands |
| Maurice Martens | 29:92 | 10685 | 05 Sep 1976v Iceland |
| Paul Courant | 27:145 | 10007 | 26 Mar 1977v Netherlands |
| Hugo Broos | 26:350 | 9847 | 26 Mar 1977v Netherlands |
| Roger Van Gool | 26:298 | 9795 | 26 Mar 1977v Netherlands |
| Walter Meeuws | 25:199 | 9331 | 26 Jan 1977v Italy |
| Rene Verheyen | 25:5 | 9137 | 26 Mar 1977v Netherlands |
| Willy Wellens | 22:362 | 8398 | 26 Mar 1977v Netherlands |
| Eric Gerets | 22:253 | 8289 | 26 Jan 1977v Italy |
| François Van der Elst | 22:115 | 8151 | 26 Mar 1977v Netherlands |
| Ludovic Coeck | 21:182 | 7853 | 26 Mar 1977v Netherlands |
| Michel Renquin | 21:84 | 7755 | 26 Jan 1977v Italy |
| Jan Ceulemans | 20:26 | 7331 | 26 Mar 1977v Netherlands |