LAS VEGAS, NV - SEPTEMBER 13: Marcos Maidana (L) lands a heavy punch to the face of Floyd Mayweather Jr. during their WBC/WBA welterweight title fight at the MGM Grand Garden Arena on September 13, 2014 in Las Vegas, Nevada. (Photo by Alex Menendez/Getty Images) *** Local Caption *** Floyd Mayweather Jr; Marcos Maidana