Philip Rivers handed the ball off to Ryan Matthews on their first offensive play, but Sio Moore met him in the backfield and didn't allow him to gain a yard.
Facing a 3rd &14 on their second series of the game, Derek Carr dropped back and found Kenbrell Thompkins on the outside for a gain of 12.
With just under 12 minutes left in the first quarter, Rivers handed the ball off to Ryan Matthews but the running back had nowhere to go and was stopped for no gain.
On 3rd &10, Antonio Smith was able to apply pressure to Rivers who eventually threw the ball away, and as a result the Chargers had to punt.
Facing a 3rd & 8, Carr threw a quick slant to Andre Holmes who picked up the first down and kept the drive moving.
On the next play, Carr rolled to his right and found a wide-open Mychal Rivera for a gain of 33.
The drive stalled, but Sebastian Janikowski came on and knocked in a 42-yard field goal to give the Raiders their first points of the afternoon.
The Raiders rush defense continued to impress during the first quarter as Ryan Matthews was once again stopped for no gain with just under 7 minutes left in the opening frame.
The Raiders defense was able to get off the field as Rivers tried to connect with Keenan Allen on 3rd & 5, but was unable to do as a result of tight coverage from TJ Carrie.
On the first play of the second quarter, Rivers connected with Malcom Floyd but DJ Hayden stopped him short of the first down marker and forced a San Diego punt.
The Oakland defense forced another punt from the Chargers, as Philip Rivers couldn't find an open receiver on 3rd & 18.
The Raiders forced a San Diego field goal attempt after Benson Mayowa caused an incomplete pass from Philip Rivers on 3rd & goal.
On 1st & 10, Carr rolled out to his right and found Brice Butler on the sideline for a gain of 15 and a Raiders first down.
On the final play of the first half, Nick Novak missed a 48-yard field goal that kept the Raiders within seven point.