Wrap-up: Bears 31, Chargers 20

A look at another San Diego stumble:

What it means: The Chargers have now lost five straight games and they are falling out of the AFC West race. San Diego is 4-6 and it is two games behind division-leading Oakland, which is 6-4 and has already beaten San Diego.

Rivers’ struggles continue: San Diego quarterback Philip Rivers had a solid day as he threw for 280 yards on 21 of 31 passing. He threw two touchdowns. However, he threw two more interceptions in the fourth quarter. Rivers has made critical miscues in the fourth quarter in all six of the Chargers’ defeats this season. Rivers has thrown 17 interceptions in 10 games. It is his highest interception total of his career.

Vincent Jackson has a big game: The San Diego receiver had 165 yards receiving on seven catches. He also had a touchdown. Jackson has to be a major part of the offense for the rest of the season.

Mathews has ball security issues: Second-year running back Ryan Mathews had a tough day. He fumbled twice and lost one. Mathews had just 37 yards on 13 carries.

The offensive line holds up: Credit the makeshift San Diego offensive line. Playing without three injured starters, the line did not give up any sacks Sunday. The Chargers will have to keep it up on the fly. The San Diego Union Tribune reports that left tackle Marcus McNeill may miss the rest of the season with a neck stinger.

Cutler wins dual: Rivers lost his first game playing former AFC West rival, Jay Cutler, since 2008. Cutler threw for 286 yards in the win.

Defense sagging: The San Diego defense has been giving up way too many big plays during this five-game losing streak. It looks tired and overmatched.

What’s next: The Chargers host Tim Tebow and the hot Denver Broncos in Week 12.