Baldomir and Cotto, both slow but Cotto being better .

Yep! Both are slow compared to Mayweather which makes them easy targets and also easy to get away from trouble.

If we want to see Mayweather loose we'll have a better chance on seeing that if he goes to MMA rather than facing any slow guy already mentioned.

Hhhhhmmmm Williams comes to mind at the moment. Not that of a big name yet and needs to be polished a little bit but at least he has the reach, speed, etc. After De La Hoya and Hatton, can't see any one out there really giving him some challenge .