What is the most drastic change in style of a fighter you've seen?

[greynotsoold]

Barrera actually changed his approach twice. Early in his career, and I was ringside at his first US fight when he was 18, he was very much a boxer, especially in his fights with Israel Perez and Eddie Cook. When he started appearing on PPVs he became much more aggressive, then later became a more thoughtful fighter, as he had been early in his career.
The most dramatic change, according to what I've read, was in Cornelius Boza-Edwards, noted for the legendary wars he engaged in, with bobby Chacon among others. Apparently he began as a more careful fighter, but bazooka limon threatened to kill him, which got under his skin and they got to fighting and it went from there.

[greynotsoold]

Barrera actually changed direction twice, as he began his career as a boxer, becoming more of an all-out type fighter when he began appearing on PPvs, before becoming a more thoughtful fighter later on.
Cornelius Boza-Edwards began his career as more of a boxer until Bazooka Limon threatened to kill him. Boza-Edwards decided not to go without a fight and became legendary for the wars he subsequently engaged in.