If anyone is interested, I got much of my information from Chin's BoxRec profile which shows all of the official bouts of his career. BoxRec is the official record keeper for the sport of boxing, so their information is usually excellent. As you'll see, the 21-4 is a decent record on the surface, but with an 8% KO ratio and the level of opposition he was facing, I wouldn't deem him a world class fighter. That being said, it's worth noting Gigante was a very young fighter (allegedly using the birth certificate of a deceased relative to earn his boxing license). He retired at 19. Who knows what he could've achieved if he stuck with it.