Strength vs. weakness: 49ers ground game vs. Packers' run D

Daily 49ers blog for NBC Bay Area website: The 49ers love to run the football, and the Packers haven't been able to stop a ground attack in weeks. It sounds like a formula for San Francisco success in their playoff matchup this Sunday. http://www.nbcbayarea.com/news/sports/Packers-are-Vulnerable-to-49ers-Running-Game-238360691.html