Fighters who excelled quickly

[powerpuncher]

How about people without much of an amateur background?

Ahhh...

How about Wilfredo Vazquez Jr, started training in his early 20s and went pro with no amateur career. Won the Latino super bantamweight belt 2 years into his career and won the Super Bantamweight belt 3 years, 18 fights into his pro career.

Kermit Cintron was another guy who didn't start boxing until 20 and had less than 30 amateur fights, won a welterweight title 3 years in or so.

Pac was another guy with hardly any amateur background who won a world title 3 years in or so. Duran beat Buchanan 4 years in with hardly any amateur bouts. I think Duran said in an interview he was terrible as an amateur.

I did think of vasquez but he didn't really excel. He did well and then totally lost it after the arce fight.