After Ali insult, Pac fans want KO

Manny Pacquiao and Floyd Mayweather Jr. are a good study in contrast, but their glaring difference is nowhere more evident in their respect -- or lack of it—for the greatest icons of boxing.

Last week, the self-absorbed Mayweather, who proclaims himself as “The Best Ever,” apparently crossed the line. He questioned the legacy of Muhammad Ali and Sugar Ray Robinson—undoubtedly the consensus greatest fighters of all time.