The traditional old four boxing belt organizations are officially well and truly dead and no longer relevant now. Here's why.

Add Yahoo as a preferred source to see more of our stories on Google. Ever watched a top boxer fight? Chances are your jaw dropped—not just from how fast they moved, but how savage their blows were.

Boxing has always thrived on rivalries. From Muhammad Ali’s thunderous all-time trilogy with Joe Frazier to Manny Pacquiao’s epic four-fight series with Juan Manuel Marquez, these weren’t just ...