Here's the video, with Torrealba hitting Dario Rivero Jr., around the 1:00 mark.
Torrealba was ejected after striking out swinging in the eighth inning. Torrealba is hitting .246/.290/.333 in 17 games for Leones.
"[We're] aware, but we haven't got much info yet," Rangers general manager Jon Daniels told the Fort Worth Star-Telegram. "We will look into it."
When asked by the paper if there could be further disciplinary action against Torrealba for his actions in a non-MLB game, Daniels said it "depends on the circumstances."
H/T: Hardball Talk