The official fight odds aren't out yet but Floyd Mayweather Jr. should be the heavy favorite against Victor Ortiz for their fight. The Mayweather vs Ortiz fight will happen on September 17, 2011 on MGM Grand in Las Vegas, Nevada. I know the MGM would love to host a Mayweather vs Ortiz fight. I think even Mayweather would love it. He will be ready to hook up with his uncle Roger as soon as they kick off the eight-week preparation. Many boxing analysts said pick Mayweather as the winner during an interview, and almost instantly the Pretty Boy has become the favorite.