Canelo Alvarez raises his arms after being declared the winner over Shane Mosley by unanimous decision during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Isaac Brekken / AP

Canelo Alvarez reacts after beating Shane Mosley by unanimous decision during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Canelo Alvarez winces as a cut above his left eye reopens in the tenth round against Shane Mosley during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Canelo Alvarez lands a punch against Shane Mosley in the 10th round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Isaac Brekken / AP

Canelo Alvarez walks back to his corner in the seventh round against Shane Mosley during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Canelo Alvarez, left, lands a body punch against Shane Mosley in the fifth round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Canelo Alvarez throws a punch against Shane Mosley in the fourth round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Isaac Brekken / AP

Canelo Alvarez, left, lands a punch against Shane Mosley in the fourth round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Shane Mosley, left, and Canelo Alvarez exchange punches in the third round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Shane Mosley, right, lands a punch against Canelo Alvarez in the third round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Canelo Alvarez, right, lands a punch against Shane Mosley in the second round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Isaac Brekken / AP

Canelo Alvarez, left, lands a punch against Shane Mosley in the first round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Canelo Alvarez, left, throws a punch against Shane Mosley in the first round during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Canelo Alvarez, left, throws a punch against Shane Mosley during a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP

Mexico's Canelo Alvarez waves to boxing fans before fighting Shane Mosley in a WBC super welterweight title fight, Saturday, May 5, 2012, in Las Vegas. Eric Jamison / AP