Derek Carr dropped back on third-and-long, saw nothing develop downfield and decided to scramble 11 yards to a first down before punctuating the play with a demonstrative fist pump and scream.A quarterback who had been hesitant — and often ineffective — when running the ball during his first six seasons has added a new dimension to his game that is paying big dividends this year for the Las Vegas Raiders.“He has a lot of pride in his performance and he really wants to improve and I think he knows one of the areas that he can really make a difference is running for a first down here and there,” coach Jon Gruden said. “We all know he can hurt you with his arm, he can get it done in the pocket, but 42 yards rushing, a scramble for a first down.