Forty-Niners fullback Bruce Miller was arrested Thursday night in Santa Clara, Calif., on suspicion of domestic battery.
Spousal battery in California is defined as a misdemeanor and punishment could include a fine or up to one year in jail.
Miller has been engaged since August 2014.
CSN Bay Area's Matt Maiocco obtained a police report that says Miller pushed the woman and "destroyed her cell phone."
Miller's case is now being handled by the Santa Clara County District Attorney's office.
The 49ers released a statement saying they are "aware of the matter involving Bruce Miller. We were disappointed to learn of these reports and will do our due diligence in collecting all relevant information.”
In 2014, the 49ers allowed Ray McDonald to play while under investigation for domestic assault. In December, he was accused of sexual assault and promptly cut from the team.
Under the NFL's recently passed personal conduct policy, the league allows a player to be suspended with pay until the conclusion of their legal proceedings. Then, the team and league are able to judge whether to (and to what extent) punish a player.
Miller has played for the team since he was drafted in 2011.