I don't think that "good" records mean as much as many people seem think they do. Much of the time an undefeated record simply indicates success at having carefully avoided high caliber fighters during one's career in order to build a good record. That may be good from a promoter's standpoint, to be able to say "undefeated", but it isn't necessarily the best way to fulfill one's potential as a fighter. I think that some fighters improve more from losing to better fighters, than they would by continually beating fighters who aren't up to their level.