The 49ers aren't simply going to hand the No. 2 running back job to Brian Westbrook. San Francisco signed Westbrook earlier this week to help spell starter Frank Gore. Rookie Anthony Dixon is going to get a chance to be the team's top reserve despite Westbrook's advantage in the experience department. "I like the way he ran with the football and his physicality," offensive coordinator Jimmy Raye said of Dixon. "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."