Jarret Johnson burst through the left side to force a fumble on second down that the Bears recovered, and Cutler held the ball too long on the next play, resulting in a sack for Corey Liuget.
Forte set up Chicago’s first touchdown on the next possession when he turned a pitch into a 58-yard sprint down the left side to the 5. Marshall, who sat out last week after having offseason hip surgery, then caught a strike from Cutler in tight coverage to give the Bears a 7-0 lead.
They had a chance to add to it after Chris Conte picked off Rivers at the 35 on the next possession. But on the first play, Cutler got intercepted by Donald Butler trying to hit Marshall in double coverage.
“I didn’t misread,” Cutler said. “I knew what I was doing. (I) kind of got clipped, I let it go, but those are the ones that you kind of want to check down after you see the picture.”
Trestman tried to take some blame for the pick, saying the Bears had not run that play much.
He also made it clear he wasn’t thrilled with Cutler’s decision, saying, “There’s a time to force the ball and use your arm and put it up into man-to-man coverage when there’s a single man and a single player, and that really wasn’t one of those situations.”
That Peppers sat out his second game was a bit of a surprise, considering Trestman had said he would play.
The Chargers held out Danny Woodhead because of his undisclosed injury and receiver Malcolm Floyd after he hurt his right knee in practice on Monday. Rookie linebacker Manti Te’o also sat out as expected after spraining his right foot against Seattle last week.
Liuget left late in the first quarter with a shoulder injury. And Bears third-string quarterback Matt Blanchard broke a knuckle on his left hand in the second half, forcing Josh McCown back into the game. Trestman wasn’t sure how long he would be out but did say the Bears will need to bring in another QB.