Raiders hope 'under-the-radar' tackles can aid defense

Daily Raiders blog for NBC Bay Area website: Pat Sims and Vance Walker hardly are household names, even to Raiders fans. But they may play a big role for the team in 2013. http://www.nbcbayarea.com/news/sports/Raiders-New-Defensive-Tackles-Ready-to-Stop-the-Run-210083051.html