Tony Sparano shot down speculation on ESPN that the Dolphins could be shopping running back Ronnie Brown. "No chance that we're trading Ronnie," Sparano said early this afternoon. "I understand another rumor is flying out there. Last week, it was (quarterback John) Beck. This week it's Ronnie. "There was no discussion of that internally or externally. None." Speaking on Monday Night Countdown, ESPN's Chris Mortensen said Brown could be playing for another team this season. Mortensen based his comment on the fact that running back Ricky Williams has looked very sharp during two pre-season games in which Brown has done little.