No, the wrestler will almost always win over the boxer. In '76 Ali fought Antonio Inoki, and set so many ridiculous rules, that it ended up being a draw. But with no picking up, or slams allowed, Inoki's game was taken away, and it ended up being pretty much a dud.
And Sapp is 360 lbs. of muscle, has been fighting in Pride for a few years now, and has actually worked on his submission skills so as not to just be a pummelling monster, although he still is.