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Chile's oldest players during the 1921 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 |
|---|---|---|---|
| Ulises Poirier | 23:235 | 8636 | 26 Sep 1920v Uruguay |
| Humberto Elgueta | 16:16 | 5860 | 26 Sep 1920v Uruguay |