he mentions la motta & robinson, barkley/hearns, etc. but who is to say that pac style of fighting is the one that presents problems for mayweather jr. people looks at the style outside the ring but once inside a certain style can throw you off as the fights mentioned above marquez/pac.
Well, Pacquiao could concievably swarm Mayweather to a decision if he fights at the level and with the output that he had in his best fights. However it depends on how Pacquiao handles being tagged by Floyd and if he is able to keep up that high level of output throughout.
Styles do make fights, they always did. People seem to forget it once someone is getting a little hype, which is a shame.