Staley injury adds to cracks in 49ers' offensive line

Daily 49ers blog for NBC Bay Area website: The 49ers' offensive line, once so stable, now only has two players at the positions where they started the 2013 season, and the extent of the injury to LT Joe Staley is still to be determined. http://www.nbcbayarea.com/news/sports/Niners-Once-Durable-Offensive-Line-Falling-Apart-234085161.html