Why Tramaine Brock Is True Key to San Francisco 49ers’ 2014 Campaign

For all of the questions surrounding the revamped San Francisco 49ers secondary in 2014, cornerback Tramaine Brock's role may be the surest bet as the season finally draws near.

Outside of Pro Bowl safety Eric Reid, last year's star rookie, Brock was the most significant contributor of any 2013 defensive back still on the current roster. Former starting cornerbacks Tarell Brown and Car...

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