Dec 7, 2014; Oakland, CA, USA; Oakland Raiders guard Austin Howard (77) is called for unnecessary roughness as he pushes San Francisco 49ers cornerback Perrish Cox (20) after the whistle where Cox, defensive back Dontae Johnson (36) and inside linebacker Chris Borland (50) stopped Oakland Raiders running back Latavius Murray (28) during the first quarter at O.co Coliseum. Mandatory Credit: Kelley L Cox-USA TODAY Sports