Weak Bears' run defense may be an opportunity for 49ers

Daily 49ers blog for NBC Bay Area website: Chicago ranks as one of the NFL's poorest run-defending teams, so the 49ers -- even without Carlos Hyde -- may be able to have a big day on the ground. http://www.nbcbayarea.com/news/sports/Niners-May-be-Able-to-Run-the-Ball-on-Bears-360577721.html