Floyd Mayweather Jr. is set to put his undefeated record on the line against Andre Berto on Saturday night.<br />The welterweight title fight hasn't generated as much hype as most "Money" bouts, but that doesn't take away from its importance.<br />Mayweather needs a victory to reach 49-0, a record that would tie the legendary Rocky Marciano.<br />A loss for such an overwhelming favorite would do serious damage to his lasting legacy.<br />And, on the flip side, pulling off the massive upset would be the top moment of Berto's career.
