Boxing: Unbeaten Mayweather makes it official - he's back

Mayweather, 39-0 with 25 knockouts, was the undisputed welterweight champion after stopping England's Hatton in the 10th round here in December of 2007, but he retired after the fight, abdicating his pound-for-pound throne.
Pacquiao claimed that honor with three triumphs in three weight classes last year, the last of them over Oscar de la Hoya to send him into retirement.
But before Pacquiao and Hatton could meet for Hatton's International Boxing Organization junior welterweight crown and pound-for-pound honors, Mayweather stole their thunder by returning to make his own claim for the throne.
The issue figures to be settled in the ring, with the Hatton-Pacquiao winner becoming the likely next foe for Mayweather, possibly later this year.
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