Infamous backyard brawler Kimbo Slice is going legit. Kimbo has been training for an upcoming fight against legendary boxer Ray Mercer at Cage Fury Fighting Championships (CFFC) 5. The event is to be held at the Boardwalk Hall in Atlantic City, NJ on June 23. The CFFC is promoting the upcoming event at the end of Kimbo’s fight videos. The latest backyard brawl video has Kimbo taking on Chico, who puts up a good fight until he gets backed into a corner.