Oliver suffered an Achilles tendon tear last week against the Minnesota Vikings and is done for the season.
Melvin Gordon and Danny Woodhead will carry most of the workload for the Chargers during the regular season. However, Farrow proved he has enough knowledge of the offense and ability to contribute in a reserve role.
The 47,407 in attendance at Qualcomm Stadium would see what San Francisco 49ers quarterback Colin Kaepernick would do after vowing to continue his protest this week.
But that didn’t deter Kaepernick, as he led San Francisco on a 16-play, 85-yard scoring drive to open the game that culminated in a 1-yard plunge by DuJuan Harris into the end zone, giving the 49ers a 6-0 advantage.
San Diego took a 7-6 lead with 9:51 left in the opening half on a 1-yard plunge by fullback and U.S. Navy officer Chris Swain on the team’s annual salute-to-the-military night.
The Chargers pushed their lead to 21-9 lead late in the third quarter on a 17-yard touchdown catch by Isaiah Burse from undrafted rookie quarterback Mike Bercovici. But San Francisco roared back, scoring 22 straight unanswered points to seal the win.
San Diego finished the preseason 1-3 overall.
The Chargers and 49ers have met 45 times during preseason play, including every year since 1987. San Francisco holds a 25-20 advantage in the series.
QB depth chart: Kellen Clemens played the entire first half. He completed 11-of-15 passes for 113 yards, with no touchdowns and no interceptions. Bercovici played the second half, finishing 8-of-13 for 75 yards, a touchdown pass and two interceptions.
Maybe that player could start: Given a chance to play extended time at receiver, Burse flashed some skills, finishing with five catches for 63 yards, including the 17-yard score from Bercovici.
Who got hurt? Receiver Rasheed Bailey suffered an ankle injury in the second quarter and did not return.
A surprise player who impressed: In his first significant action of the preseason, tight end Sean McGrath made some plays. Known more his blocking, McGrath finished with three catches for 24 yards, including a long of 12 yards. McGrath also subbed for long-snapper Mike Windt late in the game, so he appears to be San Diego’s emergency option there.
Turnover party: Safety Adrian McDonald and corner Trevor Williams both finished with interceptions for the Chargers, giving the Chargers four interceptions and three fumbles recovered in four exhibition games. Creating turnovers was a point of emphasis for the Chargers during offseason and training camp.
Bosa waits his turn: Participating in an on-field workout with veteran players, rookie first-round draft pick Joey Bosa did not suit up for San Diego’s final preseason game, watching from the sideline in a T-shirt and shorts. Bosa said he felt good after the workout. Chargers head coach Mike McCoy would not disclose whether Bosa will compete in the Sept. 11 season opener at Kansas City, but if all goes well during practice next week, the Ohio State product has a chance to play.