In pictures: US Sport's 2004 in pictures
July: Potential unfilled

Miami Dolphins running back Ricky Williams stunned the sport by retiring at the age of just 27.

A supremely talented player he infuriated coaches with his erratic behaviour, yet just as he was beginning to fulfil his potential, he quit.

Williams said he had grown tired of the sport, but the Dolphins showed no sympathy and sued him.

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