The Raiders defense has struggled to rush the passer with just four people. Coordinator Jason Tarver typically has to get creative to generate pressure, which leaves other parts of the field unprotected. He didn’t have to do that on Sunday. The Raiders rattled Colin Kaepernick during a 24-13 victory over the 49ers with a solid mix of pressure and coverage from opening drive to the final whistle. Oakland sacked him five times and intercepted him twice in its best defensive effort of the season. The 49ers were 3-of-11 on third down, and never seemed in sync during their second straight loss. “Whenever you get pressure on the quarterback, you know you’re in his head,” said defensive tackle Antonio Smith, who had two sacks himself. “I think, early on, he was having success breaking out of the pocket and making some big runs, so that kind of gave him confidence. But once we kind of closed the front down and stopped him from breaking open the middle, it just made it that much easier to get him down.” Pressure forced some ill-advised decisions. Kaepernick’s first pass was intercepted by Brandian Ross, which led to a Raiders field goal. Free safety Charles Woodson secured his 59th interception in the fourth quarter, which essentially secured victory for the Raiders.