Any pro who is willing to fight Kimbo using Kimbo's rules needs to have his head examined. It's not that he will lose, it's that he can break his hand on Kimbo's dome.
Why put your career at risk? Kimbo has hard hands, and although he is strong, he doesn't KO his opponents cold. Except for the last guy, and even that took a suckerpunch to accomplish. (suckerpunch in that the guy turned his back and didn't see it coming, not saying it was illegal)
If Kimbo had big power, world class boxing power, his hands would probably be shot by now.
Any pro willing to chance injuring himself and putting his career at risk needs to rethink the glory of the KTFO of Kimbo.