Frank Gore went to the San Francisco 49ers' has been ruled out with a concussion against the Seattle Seahawks after being evaluated for a head injury in the locker room. He took a hard hit while blocking, and remained on the ground for several moments before getting up and jogging off the field.
Gore left the game after carrying a heavy load. He had 11 carries and a touchdown, though he managed just 29 yards on the ground. The 49ers took a 7-3 lead into halftime.
With Gore out, the 49ers will rely on Carlos Hyde in the running game. Hyde is off to a good start Sunday, with 45 yards on just three carries.
Gore struggled with injuries early in his career, but has become a workhorse for the 49ers in recent years. At 31 years old, he will likely fall shy of 1,000 yards rushing this season for the first time since 2010.