Brian Westbrook has a history of success as an NFL running back. Rookie Anthony Dixon’s NFL experience consists of one exhibition game, as far as San Francisco offensive coordinator Jimmy Raye is concerned, they are both on even ground. Raye rallied support around Dixon a day after Westbrook made his training camp debut with the 49ers as a possible backup to Frank Gore. Raye said Wednesday it’s not a sure thing that Westbrook will step right into the spot vacated by the sudden retirement of Glen Coffee. Dixon impressed the coaches in the 49ers’ 37-17 exhibition victory over the Indianapolis Colts, rushing for 100 yards with a touchdown. “I like the way he ran with the football and his physicality,†Raye said. “We had some concerns about his ability to play without the ball. He demonstrated otherwise. His performance in his first opportunity, in his first year, was pretty good.†Source: Associated Press