Chicago off to flying start
The Pittsburgh Steelers slumped to 0-3 for the first time since 1986 as they lost 40-23 to the Chicago Bears.
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Ben Roethlisberger was intercepted twice while the Bears defense forced five Pittsburgh turnovers to see the Chicago remain unbeaten.
Robbie Gould's field goal got the Bears off to a flying start, while Matt Forte rushed over from five yards and Michael Bush's one-yard touchdown run saw Chicago 17-0 up at the end of the first quarter.
Shaun Suisham finally opened Pittsburgh account with a 27-yard field goal, only for Major Wright to return a Roethlisberger interception 38 yards for a touchdown.
Roethlisberger made some amends with a 33-yard touchdown pass to Antonio Brown to cut the deficit to 24-10.
Gould's second field goal moved the Bears 17-points clear but the Steelers threatened to upset the odds as they fought back.
Field goals from Suisham sandwiched Roethlisberger's 21-yard TD pass to Brown to give the Steelers hope.
However fourth-quarter touchdowns from Earl Bennett and Julius Peppers put the result beyond doubt for the Bears.
Jay Cutler completed 20-of-30 passes for 159 yards for Chicago, while opposite number Roethlisberger threw for 406 yards in a losing cause.