| Referee | P |  |
 |
 |
P / C |
|---|---|---|---|---|---|
| Armando Villarreal | 13 | 3 | - | - | 4.33 |
| Ramy Touchan | 4 | 2 | - | - | 2 |
| Ismail Elfath | 8 | 2 | - | - | 4 |
| Chris Penso | 13 | 2 | - | - | 6.5 |
| Victor Rivas | 1 | 1 | - | - | 1 |
| Jon Freeman | 1 | 1 | - | - | 1 |
| Edvin Jurisevic | 2 | 1 | - | - | 2 |
| Rosendo Mendoza | 2 | 1 | - | - | 2 |
| Ted Unkel | 6 | 1 | - | - | 6 |
| Allen Chapman | 6 | 1 | - | - | 6 |
| Mark Geiger | 6 | 1 | - | - | 6 |
| Drew Fischer | 7 | 1 | - | - | 7 |
| Nima Saghafi | 7 | 1 | - | - | 7 |
| Alan Kelly | 8 | 1 | - | - | 8 |
| Robert Sibiga | 11 | 1 | - | - | 11 |
| Kevin Stott | 2 | 0 | 1 | - | 2 |
P = Matches played,
C = Cards .