Fighters who have changed their styles drastically?

[Thread Stealer]

Hagler when he fought Hearns.

That was more of a one fight thing though instead of permanent. His aggression after that wasnt so whirlwind like, more methodical.

[Sugarj]

Barrera might be a good example for he was a reckless brawler who paid because of that against Junior Jones. Later he turned into a better boxer as you said and beat Hamed that way. That same Barrera that got kod by Jones, I dread to imagine what Hamed woulda done to him.

Also Lennox Lewis did change quite a lot after Steward started to train him. Before that he was lounging and swinging wildly, very inaccurate with his shots and relied on sheer size and power to overpower his opponents, as well as holding and hitting, which remained his trademark. But under Steward his boxing skills developed considerably and so he was able to remain on top. McCall exposed him for his lack of skills and coordination in that first fight.

Yes, clearly Hamed prepared for the Barrera who turned up for Moralles the first time. Barrera would have been wide open for those nasty right lead corkscrew uppercuts, had he fought Hamed with reckless abandon on the front foot.