An NFL team acts very fast after one of its players is arrested on a domestic violence allegation

He was arrested Thursday night

The San Francisco 49ers wasted little time after this news broke:

Here's what the Niners did:

KNTV reported that Brock's girlfriend, who is also the mother of his two children, called 911, and when officers arrived they found the woman had marks around her neck. Brock was taken into custody on a felony domestic violence allegation, and was released on a $50,000 bond. He declined comment, KNTV said.

The Bay area news station also reported this is the 15th time a Niners player has been arrested since 2012, the most in the NFL during that time period,

Brock, a 28-year-old cornerback, played in all 16 games for the Niners last season, with 48 tackles and one INT.