The official weigh-in's are in. Pound for pound champion Floyd Mayweather Jr weighed in at 146 while contender Robert Guerrero weighed in at 147. The fans cheered as they stood face to face. Mayweather, who is known to talk alot while he stands face to face with his opponents, didn't say a word. He just sat there and stared down his opponent. The card begins at 9pm Saturday night on Showtime PPV.