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Costa Rica's oldest players during the 1989 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 |
|---|---|---|---|
| German Chavarria | 30:98 | 11056 | 25 Jun 1989v El Salvador |
| Claudio Jara | 30:50 | 11008 | 25 Jun 1989v El Salvador |
| Roger Flores | 30:30 | 10988 | 25 Jun 1989v El Salvador |
| Luis Conejo | 29:175 | 10768 | 25 Jun 1989v El Salvador |
| Alexandre Guimaraes | 29:132 | 10725 | 19 Mar 1989v Guatemala |
| Marvin Obando | 29:53 | 10646 | 28 May 1989v Trinidad and Tobago |
| Juan Cayasso | 28:1 | 10228 | 25 Jun 1989v El Salvador |
| Ronald Marin | 26:221 | 9718 | 11 Jun 1989v Trinidad and Tobago |
| Maurico Montero | 25:249 | 9381 | 25 Jun 1989v El Salvador |
| Hector Marchena | 24:172 | 8938 | 25 Jun 1989v El Salvador |
| Hermidio Barrantes | 24:158 | 8924 | 07 Feb 1989v Poland |
| Vladimir Quezada | 23:44 | 8445 | 25 Jun 1989v El Salvador |
| Hernan Medford | 21:4 | 7675 | 28 May 1989v Trinidad and Tobago |
| Ronald Gonzalez | 18:197 | 6772 | 21 Feb 1989v El Salvador |
| Oscar Ramirez | 14:185 | 5299 | 11 Jun 1989v Trinidad and Tobago |