Kimbo slice will do much worse in boxing than he did in MMA. In MMA it is much easier to bully someone around with weight strength and aggression, but boxing is a sport that doesn't reward brute strength so much. There is much less contact between the bodies, there is much less making up for weaknesses by training in another aspect of the sport, like getting by with grappling and not having to learn to punch. In boxing you have to be at least good at everything in order to get a chance to be something.
THis is what's going to happen to kimbo: he will come across a taller weaker but better fighter, he will miss miss miss and then eat a straight right and miss again. The straight right wont hurt him physically, but he asks himself, how did he do that. How is he not scared. THen he goes in again, miss miss and eats a right again and a then left uppercut to the body and he is finished because his opponent figured him out.
There's a debate on Mike Tyson in another thread, and people who say he can't touch Ali are right but they exaggerate. Tyson was no fraud, he was very very good, problem is that he was small. He could punch hard, but I gaurentee Froman and Ali hit harder. WHy? THey were bigger. WHen you look at Tyson punching, it is impressive because he's almost lunging at people, but he has to do this because is smaller than them. A lot of time that he lands that left hook, his right foot is almost off the ground. THis results ina loss of leverage. Van B stated before that he tore his pec in the first or second rep of the first set, and this is evidence that your muscles exert the most force in the beginning, well this is true for boxing too. Tyson got a lot of early KOs because he let it all go in the first and second round, after that he turned into a mediocre fighter because his muscles no longer had the energy to deliver the force necessary to bully his opponents around. This is the kind of fighter that Kimbo is, it's why he lost to some gay kid on 1 week notice