About the only thing new for Alex Smith in his return to Candlestick Park was the coach on the sideline. Considering the offense's performance last week, that was a major improvement. Smith threw for 126 yards and an interception in coach Jim Harbaugh's home debut, getting showered with a mix of boos and cheers in the San Francisco 49ers' 17-3 preseason victory over the cross-bay rival Oakland Raiders on Saturday night. "We improved from last week. But if we want to be the team we're talking about being, we have to finish in the red zone and can't turn the ball over," Smith said. "In my thinking, those first few drives, we didn't finish and then had the pick. Can't do that." While the running game racked up huge chunks of yards, the passing game wasn't always crisp. Smith was 8 for 13 and came up empty in the end zone. He had a pass intercepted by defensive end Matt Shaughnessy in the second quarter and led the 49ers to a field goal in one half of play. Read more: http://scores.espn.go.com/nfl/recap?gameId=310820025
