1) It was 3 years ago. 3 years is a hell of a long time for a fighter to evolve
2) Guillard is the ONLY person to ever TKO him.
I dont think it for either of those reasons...Im leaning towards the 3rd (unseen but obvious) option.
3) People never took Melvin seriously until this past Dunham fight. Melvin was but a blip in their mind until recently. Now people are fiiiiiiiinally paying attention.