Mayweather wants what he can't have

Floyd Mayweather Jr. is thirsty for more, but refuses to quench his thirst with a matchup against Sugar Shane Mosley, writes Dan Rafael in his June rankings.

Updated: June 15, 2007, 4:09 PM ET
By Dan Rafael | ESPN.com
Who is the world's best fighter, regardless of weight class? See my top 20 below.

Click here for my division-by-division rankings, from heavyweight to strawweight.

For a list of the current champions in all weight classes, click here.

The rankings are updated on the second Thursday of each month.

Note: Results through June 14.