Crash Course Mayweather vs Moseley

The welterweight bout is a showdown between two of the world's three best fighters regardless of weight.

Mayweather ranks either first or second on most experts' pound-for-pound lists (either behind or ahead of Manny Pacquiao), while Mosley ranks no worse than No. 3.

Source:
http://sportsillustrated.cnn.com/2010/writers/bryan_armen_graham/04/29/mayweather.mosley.guide/index.html?eref=sihp&xid=shareDigg