Juan Manuel Marquez flexes his muscles for the crowd during the weigh-in 

Juan Manuel Marquez flexes his muscles for the crowd during the weigh-in for his welterweight fight against Manny Pacquiao, Friday, Dec. 7, 2012, in Las Vegas. Marquez will face Pacquiao on Saturday in Las Vegas. (AP Photo/Julie Jacobson)
Associated Press
Juan Manuel Marquez flexes his muscles for the crowd during the weigh-in for his welterweight fight against Manny Pacquiao, Friday, Dec. 7, 2012, in Las Vegas. Marquez will face Pacquiao on Saturday in Las Vegas. (AP Photo/Julie Jacobson)
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