If you have not heard of him then I will present it briefly. Kimbo Slice, which is called the real name Kevin Ferguson began his career and great fame on YouTube with his street fights. As far as I know all the matches got but one. Then put it into the UFC. On which delivered a solid performance but not excellent. And this is his first boxing debut.
In this fight is definitely able to get a stronger opponent but in any case quickly and effectively ended the match by knockout.
Not bad for a debut.
If you want a little look of his earlier street fighting and a little look at what he did before.