| Referee | Games |  |  | Cards per game |
|---|
| Rodrigo Albuquerque | 2 | 11 | 1 | 6.0 (5.5 / 0.5) | |
| Elijio Arreguin | 10 | 42 | 2 | 4.4 (4.2 / 0.2) | |
| Malik Badawi | 12 | 59 | 1 | 5.0 (4.9 / 0.1) | |
| Fotis Bazakos | 14 | 70 | 2 | 5.1 (5.0 / 0.1) | |
| Nabil Bensalah | 4 | 13 | 1 | 3.6 (3.3 / 0.3) | |
| Serhiy Boiko | 11 | 36 | 2 | 3.5 (3.3 / 0.2) | |
| Allen Chapman | 18 | 56 | 4 | 3.3 (3.1 / 0.2) | |
| Matthew Corrigan | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Alexis Da Silva | 16 | 80 | 4 | 5.3 (5.0 / 0.3) | |
| Marcos de Oliveira | 9 | 28 | 0 | 3.1 (3.1 / 0.0) | |
| Sergii Demianchuk | 11 | 42 | 0 | 3.8 (3.8 / 0.0) | |
| Marcos DeOliveira II | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Joe Dickerson | 12 | 49 | 4 | 4.4 (4.1 / 0.3) | |
| Filip Dujic | 16 | 63 | 4 | 4.2 (3.9 / 0.3) | |
| Ismail Elfath | 14 | 58 | 4 | 4.4 (4.1 / 0.3) | |
| Joshua Encarnación | 3 | 17 | 1 | 6.0 (5.7 / 0.3) | |
| Ricardo Fierro | 9 | 35 | 3 | 4.2 (3.9 / 0.3) | |
| Drew Fischer | 16 | 72 | 2 | 4.6 (4.5 / 0.1) | |
| Timothy Ford | 11 | 37 | 2 | 3.6 (3.4 / 0.2) | |
| Jon Freemon | 16 | 77 | 4 | 5.1 (4.8 / 0.3) | |
| Guido Gonzales Jr. | 9 | 44 | 3 | 5.2 (4.9 / 0.3) | |
| Guido Gonzales Jr. | 2 | 5 | 1 | 3.0 (2.5 / 0.5) | |
| Jorge Gonzalez | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Lorenzo Hernandez | 12 | 44 | 2 | 3.9 (3.7 / 0.2) | |
| Muhammad Kaleia | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Pierre-Luc Lauziere | 16 | 55 | 0 | 3.4 (3.4 / 0.0) | |
| Jair Marrufo | 10 | 22 | 1 | 2.3 (2.2 / 0.1) | |
| Rosendo Mendoza | 16 | 68 | 3 | 4.5 (4.3 / 0.2) | |
| Ricardo Montero | 12 | 54 | 5 | 4.9 (4.5 / 0.4) | |
| Abdou Ndiaye | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Tori Penso | 13 | 51 | 1 | 4.0 (3.9 / 0.1) | |
| Chris Penso | 13 | 69 | 1 | 5.4 (5.3 / 0.1) | |
| Victor Rivas | 17 | 78 | 4 | 4.8 (4.6 / 0.2) | |
| Brandon Stevis | 2 | 5 | 0 | 2.5 (2.5 / 0.0) | |
| Ramy Touchan | 9 | 46 | 2 | 5.3 (5.1 / 0.2) | |
| Rubiel Vazquez | 17 | 64 | 4 | 4.0 (3.8 / 0.2) | |
| Michael Venne | 2 | 11 | 0 | 5.5 (5.5 / 0.0) | |
| Armando Villareal | 12 | 53 | 0 | 4.4 (4.4 / 0.0) | |
