Honeyghan changed his style completely after the Curry fight.
Wilfredo Gomez changed his style in the 80s (can't really pick a specific fight) from being a boxer - puncher to much more like a brawler.
Wlad K, a more recent one, changed his style drastically when he got with Steward.
Macho Camacho after the Rosario fight.
Most drastic ones I can think of off the dome.
Last edited by NChristo; 05-26-2012 at 02:26 PM.