Watch Mayweather vs Mosley Free Live Streaming Online: The Floyd Mayweather Jr vs Shane Mosley bout live at the MGM Grand garden Las Vegas, Nevada. The said Mayweather vs Mosley bout is for Mosley's WBA welterweight titlte on this May 1, 2010. Who do you think will win the fight? Can Mayweather manage to beat Mosley? Lets find out by watch Mayweather vs Mosley live stream online.