The Santa Clara County District Attorney's Office said the charges stem from a violent attack on his live-in girlfriend at the couple's Los Gatos home on February 11th.
The 28-year-old woman told responding officers that Foster dragged her by her hair, physically threw her out of the house, and punched her in the head eight to 10 times.
If Foster is convicted on all of these accounts, he could face more than 11 years in prison.
49ers linebacker Reuben Foster will not participate in team activities as his domestic violence case plays out, the team announced Sunday. Foster was initially facing one misdemeanor count of possession of a large capacity magazine, but prosecutors dropped the charge Monday in light of a higher court injunction prohibiting the enforcement of the charge. If convicted of all charges, Foster could go to prison for almost a decade.
The Santa Clara District Attorney informed Foster's attorney the misdemeanor would be dropped at his next schedule court date April 30.
The DA's office said Friday it is prepared to prosecute Foster even if the reported victim ends up not testifying, an issue that stymied previous domestic-violence cases against players.
How to score free food and more on Tax Day 2018
Check a business's website, app and social media feeds for full offer details, including coupons and any possible exclusions. The Rambler (Old Forester bourbon, peach, ginger, mint, beer float) should help get you in the seasonal spirit.
The 49ers drafted Foster 31st overall a year ago after questions about his health and character caused him to drop from being a possible top 10 pick. At this point San Francisco does not have a defined plan for how to give Foster structure while away from team activities, per Trotter, but that is something the 49ers hope to finalize when meeting with Foster.
In an official statement, the district attorney's office said Foster's live-in girlfriend was bruised and suffered a ruptured eardrum.
Foster, who has been working out on his own at the team facility since his legal troubles began, will not do so alongside his teammates, although the team is likely to continue to provide support and assistance in other ways while the matter goes through the court system.
After Foster was charged last week, the Niners issued a statement saying they meant to follow the matter and noted that Foster "is aware that his place in our organization is under great scrutiny and will depend on what is learned through the legal process". The judge also issued a no-contact order between him and the victim.
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.