OAKLAND -- A few thoughts on the San Diego Chargers’ 27-17 loss to the Oakland Raiders.

What it means: The Chargers dropped into the AFC West cellar with a loss to the Raiders in the team’s first divisional game. San Diego was the favorite heading into a contest for the first time this season but failed to play with the urgency needed to win on the road.

Blunders and miscues reign: The Chargers turned the ball over five times, and the Raiders converted those miscues into 17 points. San Diego quarterback Philip Rivers threw three interceptions, including one on the opening series, which Oakland quarterback Terrelle Pryor quickly converted into a 44-yard touchdown pass to Rod Streater. Eddie Royal's muffed punt was recovered by Oakland’s Chimdi Chekwa and converted into a 47-yard Sebastian Janikowski field goal in the second quarter. And Charles Woodson scored a touchdown on a 25-yard fumble return when linebacker Kevin Burnett jarred the ball loose from Danny Woodhead on a big hit in the third quarter. The Chargers also had a field goal try blocked. San Diego’s defense failed to contain Pryor, who finished 18-of-23 passing for 221 yards and two touchdowns.

Offense sputters: San Diego’s offense had been purring through the first quarter of the season heading into Sunday’s contest, but Rivers and the rest of the offense sputtered against the Raiders. The Chargers were shut out in the first half for the first time this season. They finished with more than 400 yards of offense but just 32 rushing yards. The Chargers played most of the contest without their leading rusher, Ryan Mathews, who left the game in the first half with a concussion.

Young receivers play well: Vincent Brown has his best game of the season, finishing with eight receptions for 117 yards, including a long of 51 yards, and rookie Keenan Allen had his second straight productive game, finishing with six catches for 115 yards, including a 7-yard touchdown.

What’s next: The Chargers return home to Qualcomm Stadium to face the Indianapolis Colts next Monday night.