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Why 49ers Can Remain a Top-5 Defense in 2015 Despite Critical Offseason Losses

B/R Video@@bleacherreportB/R VideoJune 1, 2015

AP

The San Francisco 49ers experienced plenty of turnover on their defense this season, headlined by the retirements of Chris Borland and Justin Smith.

Who will step up on defense? Should fans be worried about their defense?

Watch as Stephen Nelson and Bleacher Report NFL Analyst Chris Simms discuss the 49ers defense in the video above. 

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