its pointless to stay in one weight class once you owned it. just like most of the boxers all move up for more challenges. sure oscar de la hoya could have been lightweight champ for 15 yrs but who would have paid for the ppvs and wanted to watch him beat another nobody? bj penn could have been champ in the lightweight division for a very long time but was better then all the lightweights so he tried to move up. its the same for gsp. ill never watch another ppv with him headlining another fight against a bum.