| Referee | P |  |
 |
 |
P / C |
|---|---|---|---|---|---|
| Baldomero Toledo | 6 | 3 | - | - | 2 |
| Kevin Stott | 6 | 3 | - | - | 2 |
| Marcos de Oliveira | 2 | 2 | - | - | 1 |
| Ismail Elfath | 4 | 2 | - | - | 2 |
| Ricardo Salazar | 6 | 2 | - | - | 3 |
| Chris Penso | 7 | 2 | - | - | 3.5 |
| Daniel Fitzgerald | 1 | 1 | - | - | 1 |
| Stephane Bre | 1 | 1 | - | - | 1 |
| Alan Kelly | 2 | 1 | - | - | 2 |
| Hilario Grajeda | 2 | 1 | - | - | 2 |
| Drew Fischer | 3 | 1 | - | - | 3 |
| Silviu Petrescu | 3 | 1 | - | - | 3 |
| Mark Geiger | 7 | 1 | - | - | 7 |
| Said Ennjimi | 2 | 0 | 1 | - | 2 |
| Juan Guzman | 4 | 0 | 1 | - | 4 |
| Edvin Jurisevic | 4 | 0 | 1 | - | 4 |
P = Matches played,
C = Cards .