According to local prosecutors, Foster's 28-year-old girlfriend had to flag down a passing vehicle after he threw her out of his Los Gatos house.
The charges stem from a February 11 incident where prosecutors contend Foster "dragged" his live-in girlfriend "by her hair, physically threw her out of the house, and punched her in the head 8 to 10 times", rupturing her eardrum.
If convicted of those crimes, Foster faces more than 11 years in prison, according to the DA's office.
The report states that Foster will not participate in the 49ers' offseason program as the legal system takes its course. "As previously stated, his future with the team will be determined by the information revealed during the legal process", the team announced in a statement.
The district attorney's office cited the injunction issued last June by a U.S. District Court judge as the reason to drop the misdemeanor charge regarding the large capacity magazine.
The informal ban from offseason workouts at the facility does not preclude the 49ers from assisting Foster off the field, and that includes support from Lynch, front-office advisor Keena Turner and player engagement director Austin Moss. "This is way beyond a simple domestic violence case", says Steven Clark, legal analyst and former prosecutor.More news: Third-Party Reporting Allows Sexual Assault Victims Anonymity
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Investigators said the alleged assault by Foster left his live-in girlfriend bruised and with a ruptured ear drum.
San Francisco released a statement Thursday acknowledging the charges against Foster.
When fullback Bruce Miller was in the midst of legal woes stemming from a domestic incident in 2015, he stayed away from the offseason program; Miller was released prior to the 2016 season after a different arrest for assault.
Foster is free on $75,000 bond and has a plea hearing on April 30. "He is now facing two strikes, under the three strikes law".
The NFL has said it is looking into possible discipline for Foster for both infractions. "Reuben is aware that his place in our organization is under great scrutiny and will depend on what is learned through the legal process". "We will continue to follow this serious matter".
"We don't condone this kind of behavior and certainly would not like to see any of our players have any of these kinds of issues or the victims to suffer any at all".