Arrow indicates direction team is trending.Final Power Ranking: 4Preseason Power Ranking: 2Biggest surprise: The impact that Michael Crabtree's injury and then his return had on the team. When Crabtree suffered a torn Achilles in May, the 49ers knew it would affect their offense. But his absence was felt dramatically during the 11 games he was out. The 49ers had essentially nothing behind receiver Anquan Boldin and tight end Vernon Davis in the passing game when Crabtree was out.