| World Cup 2002 Japan/South Korea - Appearances as Referee |  |
 |
 |
||||
| 04/06/2002 | Japan | - | Belgium | 2:2 | 6 | - | - |
| 13/06/2002 | Ecuador | - | Croatia | 1:0 | 3 | - | - |
| World Cup 2002 Japan/South Korea - Appearances as Referee | |
|
|
||||
| 04/06/2002 | Japan | - | Belgium | 2:2 | 6 | - | - |
| 13/06/2002 | Ecuador | - | Croatia | 1:0 | 3 | - | - |
| Complete name: | William Mattus Vega |
| Born: | 17/04/1964 |
| Place of birth: |
Costa Rica |
| Nationality: |
Costa Rica |
| Height: | 169 cm |
| Weight: | 75 kg |