Before his "retirement" after the Hatton fight, Floyd Mayweather Jr. was rated as the number one pound for pound fighter in the world. After his retirement, Manny Pacquiao became #1 by default, but he went on a tear, moving up three weight classes and defeating Oscar de la Hoya (more convincingly than Mayweather), Ricky Hatton (more convincingly than Mayweather), Miguel Cotto and Joshua Clottey. Since Mayweather returned from retirement, he defeated Juan Manuel Marquez , who was much smaller than Mayweather, but was the #2 pound for pound fighter in the world. Last night, he dominated Shane Mosley, a true welterweight who was in the top 5 pound for pound.
After last night's performance, who do you have #1, and did that change after last night's performance?