Neither Canelo nor Brandon Rios are stiffs. Any Top 3 man is elite, and they both warrant Top 3 rankings. They both can fight. However, Pacquiao and Mayweather have been on the P4P list for years, Pacquiao being awarded the "Fighter of the Decade" award. They're on a different level, and the proof of how good they really are is that even a bit past it, they're still too much for Top 3 guys who are in their mid-20s and about a decade younger...