San Francisco 49ers vs. Green Bay Packers Week 1 Preview

Jim Harbaugh is worried. 

And why wouldn't he be? This offseason has been a brutal one for the 49ers. They lost their star receiver to an Achilles injury, one of their primary nickel corners to a torn ACL and their flagship linebacker may not be at 100 percent for the season opener because of a fractured hand.  

Mario Manningham also won't be available until Week 7, and it's safe to say that another injury to any of the Niners' starting receivers could spell the end to their Super Bowl aspirations.  

So yeah, thing...

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