The center back will have to make his Rayados debut after sustaining the problem on international duty
Monterrey center back Hector Moreno has suffered a Grade 1 hamstring strain, the club announced, in news that will prove a short-term disappointment but can still be considered best-case scenario under the circumstances.
His muscle injury diagnosis is the mildest variety, and he will miss at least two weeks but could be back shortly thereafter.
Moreno was forced off the pitch last week on Mexico duty in the Gold Cup final against the United States, but he only underwent testing for the problem when he arrived at Rayados camp.