| Copa Lib. | 07/03/12 | Unión Española | - | Universidad Católica | 1:1 | ||||
| Primera | 07/07/12 | Unión Española | - | Audax Italiano | 3:3 |  |
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| Primera | 11/08/12 | Unión Española | - | Palestino | 1:0 | ||||
| Primera | 28/11/12 | Unión Española | - | Colo-Colo | 3:1 | ||||
| Primera | 09/12/12 | Huachipato | - | Unión Española | 3:2 pso |
| Mauro Alberto Díaz | |
| Born: | 10.03.1991 |
| Place of birth: |
Concepción del Uruguay, Entre Ríos, 
Uruguay |
| Nationality: |
Argentina
USA |
| Height: | 167 cm |
| Weight: | 61 kg |
| Position(s): | Offensive Midfielder Right Midfielder |
| Foot: | right |
