INGLEWOOD, Calif. -- Los Angeles Chargers running back J.K. Dobbins sustained a knee injury in Monday's 30-23 loss to his former team, the Baltimore Ravens, and did not play in the second half. Dobbins, who had 40 yards on six carries before being injured, left without speaking to reporters after the game. Coach Jim Harbaugh said he had no update on the running back's injury status. "I don't have any update," Harbaugh said. "I know it's a knee." Dobbins was injured about five minutes before halftime when he was wrenched backward by linebacker Malik Harrison and then gang-tackled by Baltimore on a play erased by a holding penalty against the Chargers. Dobbins grabbed his knee after getting up, and he eventually went to the locker room. He was ruled out for the game in the second half. Although backup Gus Edwards stepped in for Dobbins -- just as he did in Baltimore when they were teammates with the Ravens -- he managed only 11...