San Francisco 49ers Will Win NFC West with Monster Season from Defense

Over the last couple seasons it hasn't been the San Francisco 49ers defense that have held them back during the regular season. In fact, the 49ers defense has held its own since 2009. Last season it ranked sixth overall in rushing yards allowed. However, pass defense was another story (24th in the NFL).

Greg Manusky, who had run the 49ers defense since 2007, was criticized for not using a more aggressive model of the 3-4 defense. Following the 2010 season, Manusky was let go along with most of the San Francisco 49ers coaching staff. 

The new defensive coordinator: Vic Fangio ...

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