Browns RB Richardson sidelined with sore knee

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http://api.tweetmeme.com/imagebutton.gif?url=http://espn.go.com/nfl/trainingcamp12/story/_/id/8245068/trent-richardson-cleveland-browns-sore-knee-miss-preseason-opener (http://api.tweetmeme.com/share?url=http://espn.go.com/nfl/trainingcamp12/story/_/id/8245068/trent-richardson-cleveland-browns-sore-knee-miss-preseason-opener&service=bit.ly&source=espn)Cleveland Browns running back Trent Richardson, the third overall pick in the NFL draft, sat out Tuesday's practice with a sore left knee and could miss Friday's preseason opener at Detroit.

More... (http://espn.go.com/nfl/trainingcamp12/story/_/id/8245068/trent-richardson-cleveland-browns-sore-knee-miss-preseason-opener)