49ers' Brock has taken long, winding road to new role

Daily 49ers blog for NBC Bay Area website: Tramaine Brock was an afterthought in the 49ers' plans this year, but over the past two games he's won the nickel cornerback job from the injured Nnamdi Asomugha. http://www.nbcbayarea.com/news/sports/Niners-Brock-Has-Earned-His-Role-227239651.html