Niners may prosper vs. Bears' leaky run defense

Daily 49ers blog for NBC Bay Area website: The Bears run defense was the worst in the NFL last year and was exploited in a Game 1 loss to the Bills. The 49ers' strong running game may be a force in the regular-season Levi's Stadium opener Sunday night. http://www.nbcbayarea.com/news/sports/Bears-Defense-Appears-Vulnerable-to-49ers-Running-Attack-274760091.html