Tramaine Brock, 28, was arrested Thursday from his home in Santa Clara County and charged with felony domestic violence.
Jail records show that he's still in custody at the moment, though there are no other details at the moment. He was then booked for felony domestic violence.
Santa Clara police say they responded to a report of domestic violence on Thursday night at 9:35 PM.
The incident allegedly took place less than a mile from the team's Santa Clara headquarters and Levi's Stadium.
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The Niners signed the 28-year-old MS native as an undrafted free agent out of Belhaven University in 2010.
Police described her injuries as "minor" in that she received no medical attention, reported The Sacramento Bee.
At this point, there is no more information on the exact nature of the alleged incident, the injuries, or statements made by either Brock or his girlfriend. After years of hearing about their players on the police blotter on a never-ending loop, head coach Kyle Shanahan and general manager John Lynch are in the midst of attempting to change the culture in San Francisco. Brock has been with the 49ers since the 2010 season.