I once had a streak of 6 consecutive fights, taking place in 6 different countries - all of which I won inside the distance. Who am I?
Burt, you are of course thinking of the European tour... leading up to the loss of his middleweight crown against Turpin in London. This tour did take him to 6 different countries, but he visited Belgium twice - and not all his fights were ko-wins. So Robinson isn't our man.
In 1951 Archie Moore had several fights in South America, which actually included 6 straight ko-wins, but most of the fights took place in Argentina... so he never came close to visiting 6 different countries in a row.
I don't have Stevenson's complete record in front of me - so I can't say for sure, that he doesn't fit the description (but I doubt it!). However, I'm thinking of a pro - and while Mamby certainly visited a country or two, he wasn't exactly known for his many ko-wins. We're looking for someone with a KO% higher than Mamby's modest 22.35. MUCH higher!