Gallery: 
 

Reuters Mayweather Jr. of the U.S. knocks out WBC welterweight champion Ortiz, also of the U.S., during their title fight in Las Vegas - Photo

Mayweather Jr. of the U.S. knocks out WBC welterweight champion Ortiz, also of the U.S., during their title fight in Las Vegas

Sunday September 18, 08:17 AM
Floyd Mayweather Jr. (C) of the U.S. knocks out WBC welterweight champion Victor Ortiz, also of the U.S., during their title fight at the MGM Grand Garden Arena in Las Vegas, Nevada September 17, 2011. Mayweather Jr took the WBC welterweight title from Ortiz with a controversial fourth-round knockout on Saturday that prompted an angry response from the crowd and raised questions about his conduct in the ring. REUTERS/Richard Brian (UNITED STATES - Tags: SPORT BOXING)