Brian Westbrook has been on the field for just four players through the first four games of the season, but the 49ers are expected to let him see more time on Sunday. San Francisco hosts Westbrook's former team, the Eagles, at Candlestick Park on Sunday. Tight end Delanie Walker is out at least one game, possibly more, which will create an opportunity for Westbrook. "The plan we had when we got him here was make sure as we go forward and find out what he can and cannot do and letting it develop," 49ers coach Mike Singletary said. "As time goes on, I think you'll see that."