I think the thing that seperates a lot of guys on the ATG list from guys like SRR, Pacquiao, Duran, Leonard, Ali is quality of opponents.

IMO guys like Prime RJJ, Mayweather, prime Whitaker, if Benitez actually trained are that good, but they just didn't have the right circumstances surrounding them. Cotto proved he was at least competitive with Mosley, and he was competitive with Pacquiao in many ways.

If people are arguing that Pacquiao is too small then its the most dangerous fighter in the welterweight division thats too small for Mayweather.

When Mayweather beat Marquez I felt that was like Whitaker-Chavez, only much less competitive early, and Mayweather didn't impose himself physically the same way WHitaker did on Chavez. Mayweather was able to move forward more on Marquez than normal, but he didn't fight like the bigger man; he fought like the faster, better man. That's how he will beat Pacquiao as well.