| Friendlies 1997 - Appearances as Referee |  |
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| 04/02/1997 | Costa Rica | - | Slovakia | 2:2 | - | - | 1 |
| Friendlies 1997 - Appearances as Referee | |
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| 04/02/1997 | Costa Rica | - | Slovakia | 2:2 | - | - | 1 |
| Complete name: | William Mattus Vega |
| Born: | 17/04/1964 |
| Place of birth: |
Costa Rica |
| Nationality: |
Costa Rica |
| Height: | 169 cm |
| Weight: | 75 kg |