The San Francisco 49ers' Michael Crabtree was the only 1,100-yard receiver in the NFC West last season. He was the only 1,000-yard receiver, the only 900-yard receiver and the only 800-yard receiver.The breakthrough could have ramifications for the long term.2012 Michael Crabtree vs. Anquan Boldin"I'm taking a different approach this year," Crabtree told the 49ers' website. "I'm the No. 1 receiver on the 49ers and you can quote me on that because I'm really working hard and I'm really trying to be the best player, one of the best in the NFL.