| Referee | Games |  |  | Cards per game |
|---|
| Rodrigo Albuquerque | 1 | 8 | 1 | 9.0 (8.0 / 1.0) | |
| Elijio Arreguin | 7 | 32 | 2 | 4.9 (4.6 / 0.3) | |
| Malik Badawi | 7 | 36 | 1 | 5.2 (5.1 / 0.1) | |
| Fotis Bazakos | 10 | 49 | 2 | 5.1 (4.9 / 0.2) | |
| Nabil Bensalah | 4 | 13 | 1 | 3.6 (3.3 / 0.3) | |
| Serhiy Boiko | 9 | 31 | 1 | 3.5 (3.4 / 0.1) | |
| Allen Chapman | 13 | 41 | 3 | 3.4 (3.2 / 0.2) | |
| Matthew Corrigan | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Alexis Da Silva | 12 | 58 | 1 | 4.9 (4.8 / 0.1) | |
| Marcos de Oliveira | 7 | 22 | 0 | 3.1 (3.1 / 0.0) | |
| Sergii Demianchuk | 7 | 30 | 0 | 4.3 (4.3 / 0.0) | |
| Marcos DeOliveira II | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Joe Dickerson | 7 | 30 | 2 | 4.6 (4.3 / 0.3) | |
| Filip Dujic | 11 | 44 | 2 | 4.2 (4.0 / 0.2) | |
| Ismail Elfath | 10 | 42 | 3 | 4.5 (4.2 / 0.3) | |
| Joshua Encarnación | 2 | 10 | 1 | 5.5 (5.0 / 0.5) | |
| Ricardo Fierro | 5 | 19 | 1 | 4.0 (3.8 / 0.2) | |
| Drew Fischer | 11 | 54 | 2 | 5.1 (4.9 / 0.2) | |
| Timothy Ford | 9 | 34 | 2 | 4.0 (3.8 / 0.2) | |
| Jon Freemon | 10 | 50 | 3 | 5.3 (5.0 / 0.3) | |
| Guido Gonzales Jr. | 6 | 25 | 2 | 4.5 (4.2 / 0.3) | |
| Jorge Gonzalez | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Lorenzo Hernandez | 9 | 37 | 1 | 4.2 (4.1 / 0.1) | |
| Pierre-Luc Lauziere | 11 | 41 | 0 | 3.7 (3.7 / 0.0) | |
| Jair Marrufo | 6 | 12 | 1 | 2.2 (2.0 / 0.2) | |
| Rosendo Mendoza | 12 | 46 | 3 | 4.1 (3.8 / 0.3) | |
| Ricardo Montero | 8 | 39 | 4 | 5.4 (4.9 / 0.5) | |
| Chris Penso | 9 | 47 | 1 | 5.3 (5.2 / 0.1) | |
| Tori Penso | 8 | 31 | 0 | 3.9 (3.9 / 0.0) | |
| Victor Rivas | 12 | 60 | 3 | 5.3 (5.0 / 0.3) | |
| Brandon Stevis | 2 | 5 | 0 | 2.5 (2.5 / 0.0) | |
| Ramy Touchan | 4 | 16 | 1 | 4.3 (4.0 / 0.3) | |
| Rubiel Vazquez | 13 | 50 | 4 | 4.1 (3.8 / 0.3) | |
| Michael Venne | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Armando Villareal | 7 | 32 | 0 | 4.6 (4.6 / 0.0) | |
