San Francisco led the NFC in total yards (308.2) and points (14.3) allowed per game last season. On Monday Night Football, they showed up and harassed the Chicago Bears defense—the other team in the discussion of best defenses in the NFC.
Jason Campbell is more than capable as a backup, which is why the Bears went out and got him this offseason.
San Francisco just overwhelmed the Chicago offensive line and made plays all over the field. Two of the 49ers starters by the name of Smith (defensive end Justin Smith and outside linebacker Aldon Smith) swarmed Campbell all night.
Justin Smith registered just .5 sacks, but hit Campbell three times, according to ESPN. Aldon Smith racked up 5.5 sacks and put a lick on the Bears QB seven times.
Inside linebacker NaVorro Bowman was also flying around, thwarting Chicago rushing attempts en route to tallying 11 solo tackles.
Cutler wouldn’t have fared much better than Campbell did; he would've been getting knocked around just as often.
Perhaps the biggest reasons for the recognition of San Francisco’s defense being the top in the NFL right now are the respective Week 11 fortunes of the main contenders for that title.
Chicago failed to force a turnover for the first time this season—and it did so against a quarterback (Colin Kaepernick) making his first career NFL start.
San Francisco has had some recent defensive struggles in terms of stopping the run, but on Monday Night Football, the defense protected its young quarterback by dominating the opponent.
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