Foster was arrested the morning of February 11 at a home on Shannon Road in Los Gatos after the woman, who has been in a relationship with Foster for several years, flagged down a stranger's auto to get help calling 911.
Foster was also charged with felony possession of an assault weapon and misdemeanor possession of a high-capacity magazine after officers found a Sig Sauer 516 short-barreled rifle in his home while investigating his girlfriend's domestic violence report.
Foster was a first-round draft pick last April out of Alabama, and although injuries hindered the start of his rookie season, he did win NFL Defensive Rookie of the Month in December and finished as the team's second-leading tackler.
49ers linebacker Reuben Foster will not participate in team activities as his domestic violence case plays out, the team announced Sunday. The 49ers said in a statement that Foster's future with the team will be "determined by the information revealed during the legal process".
The 28-year-old is also charged with misdemeanor possession of a large caliber weapon. He was welcomed back to the team when the court case concluded, but was cut a year later following an ugly incident in San Francisco in which the fullback attacked an elderly man and his son in a hotel.
If convicted on all charges, He faces up to 11 years in prison.
In an official statement, the district attorney's office said Foster's live-in girlfriend was bruised and suffered a ruptured eardrum.
Foster was taken into custody that day but was released on a $75,000 bond.
Offseason workouts begin Monday for the 49ers.
The Niners are set to begin their offseason program Monday along with all other National Football League teams that didn't hire new head coaches. "He is now facing two strikes, under the three strikes law". "Reuben is aware that his place in our organization is under great scrutiny and will depend on what is learned through the legal process".
Foster appeared in Santa Clara County Superior Court for arraignment Thursday afternoon. This Office has been advised that a judge of the United States District Court for the Southern District of California in San Diego has issued an injunction prohibiting enforcement of the misdemeanor ammunition charge, pending review by the United States Court of Appeals for the Ninth Circuit.
The NFL has said it is monitoring the Foster case but has made no announcement of any penalties or suspensions for the second-year player.