Chicago (7-3) handed the Chargers (4-6) their fifth straight loss, their longest slide since an 0-5 start in 2003. But it wasn't easy.
Rivers threw for 280 yards. For most of the game, he looked more like a Pro Bowl quarterback than the guy who had been turning it over at an alarming rate. But two late interceptions helped preserve the win for Chicago.
"I played against Philip and San Diego many times, and they've always had a high-powered offense and they're not going to give up," said Cutler, who lost four of five against the Chargers when he was with Denver. "They're going to come back and fight. Philip is a smart quarterback. He knows where weaknesses are in defenses, especially in the third and fourth quarter, so we knew we were going to be in a battle even though we kept scoring."
The Bears were leading 31-20 when San Diego's Antoine Cason returned an interception 64 yards to the Chicago 16 before being pushed out of bounds by Joe Forte, with help from Cutler. But instead of driving for a touchdown, Rivers sealed the loss when he tried to squeeze a pass to Vincent Jackson in the end zone but got picked off by Major Wright.
Rivers also was intercepted by Chicago's Corey Graham in the closing minutes, giving the quarterback a league-leading 17 INTs, on a ball that he was trying to throw away.
Rivers said in hindsight he never should have thrown the ball that Wright intercepted, "but once it leaves your hand you can't bring it back."
Can the Chargers bounce back? They've been known to make late surges under Norv Turner, and they'll need another one if they're going to save this season.
But time may be running out.
"Absolutely," Jackson said. "We only play 16 regular-season games. We're not like NBA; we're not like hockey, so each and every one is precious."
Playing the first of four straight games against AFC West opponents, Chicago got strong performances from Cutler and Johnny Knox to remain tied with Detroit for second place in the NFC North.
Knox had three catches for 97 yards, including a twisting touchdown reception in the third quarter that made it a 14-point game, although he did slip on Cason's interception. Earl Bennett came up big, too, with 75 yards receiving, and Roy Williams chipped in with 62 yards.
Devin Hester had a 37-yard punt return and a 22-yarder that set up a second-quarter TD run by Marion Barber. And along with his contributions on offense, Knox returned a kickoff 53 yards, leading to a TD catch by Kellen Davis late in the first half.
Charles Tillman had a key strip and fumble recovery, and the Bears extended a turnaround that seemed highly unlikely just a few weeks ago. Cutler was getting pounded, and the defense was giving up big plays.
Rivers completed 21 of 31 passes, with Jackson catching seven for 165 yards.
San Diego had just tied it at 17 on a 5-yard TD catch by Jackson early in the second half when Cutler ran it in from the 1 after a 42-yard pass to Knox.
In a flash, it was a 14-point game.
Tillman stripped Ryan Mathews on the Chargers' next play from scrimmage and made the recovery, giving the Bears possession at the San Diego 37.
Two plays later, a spinning Knox hauled in a 24-yard pass from Cutler in the left corner of the end zone with his back to the quarterback, making it 31-17. Nick Novak kicked a 48-yard field goal on the first play of the fourth quarter, but the Chargers did not pick up a yard the rest of the way.
Rivers threw two incompletions after Cason's big interception return before getting picked off by Wright. And after the Bears worked 7½ minutes off the clock before punting, Graham got his interception with just under two minutes remaining.
"It's all on our defense," Roy Williams said. "That's it. Chicago football is defense and special teams. They keep kicking it to Devin. Devin's giving us the short field. If he doesn't score, we're on the 40-yard line, we're on the 30-yard line."
Notes: Bears coach Lovie Smith said he wasn't sure how serious LS Patrick Mannelly's knee injury was. The veteran missed the second half. ... The Bears have scored 30 or more in three straight games. ... Wright has an interception in three straight games. ... Jackson had 172 yards for the Chargers against New England on Sept. 18. ... San Diego is 1-4 on the road.