San Francisco 49ers linebacker Reuben Foster was arrested Saturday night at the team hotel in Tampa, Florida, on a charge of domestic violence. An arrest report from the Hillsborough County Sheriff's Office said Foster was booked into jail at 11:11 p.m. He is being held without bail. Foster was arrested by Tampa police at 9:10 p.m. at the Grand Hyatt hotel, where the team is staying before playing the Tampa Bay Buccaneers on Sunday. The 49ers didn't immediately respond to requests for comment. But general manager John Lynch and coach Kyle Shanahan said in April following a previous Foster arrest on domestic violence charges that were eventually dropped that the team had a zero-tolerance policy on the issue.  "We can promise you guys, if there's someone who ever hits their significant other, girlfriends, some person like that, that person is not going to be on our team,'' Shanahan said. "I feel strongly about that. I know John does. I know our ownership does....