| Referee | P |  |
 |
 |
P / C |
|---|---|---|---|---|---|
| Ricardo Salazar | 17 | 4 | 3 | - | 2.43 |
| Baldomero Toledo | 20 | 3 | - | - | 6.67 |
| Hilario Grajeda | 11 | 2 | - | - | 5.5 |
| Alan Kelly | 11 | 2 | - | - | 5.5 |
| Tim Weyland | 1 | 1 | - | - | 1 |
| Walter Lopez | 1 | 1 | - | - | 1 |
| Abiodun Okulaja | 2 | 1 | - | - | 2 |
| Jorge Gonzalez | 4 | 1 | - | 1 | 2 |
| Chris Penso | 6 | 1 | - | - | 6 |
| Edvin Jurisevic | 8 | 1 | - | - | 8 |
| Silviu Petrescu | 11 | 1 | - | - | 11 |
| Kevin Stott | 15 | 1 | - | - | 15 |
| Mark Geiger | 18 | 1 | - | - | 18 |
| Jair Marrufo | 20 | 1 | - | - | 20 |
P = Matches played,
C = Cards .