Five reasons 49ers could be great ... or fall short in 2013

Daily 49ers blog for NBC Bay Area website: The 49ers are a favorite to go to the Super Bowl this season, but just winning the NFC West will be tough enough. Five reasons why the Niners could go all the way ... or fall short of their goal. http://www.nbcbayarea.com/news/sports/Niners-Poised-for-Run-at-Super-Bowl-222530561.html