Oakland Raiders to let Nnamdi Asomugha prove he's best CB
 

http://api.tweetmeme.com/imagebutton...e=NFLHeadlinesAfter being tethered almost exclusively to the right side of Oakland's secondary, two-time Pro Bowl defensive back Nnamdi Asomugha is getting his freedom and will roam the field covering opponents' top receiver no matter where he lines up on the field.

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