Tyson might have done well, if he spend some time learning to prevent being taken down. He had the power and speed to potentially do well. He'd likely do better than Lewis would while strong powerful and fast, didn't have that low centre of gravity Tyson had. Having said that, he would more or less be in no mans land as far a weight goes. Lightheavy goes to 205, and heavy to about 236 or something like that..so he'd be in the middle, unless he could get down to 205. I certainly think a prime Tyson would walk through Liddell. Can't really think of too many others..maybe Roy Jones who had incredible handspeed and power, but I wouldn't like his chances against Anderson Silva. All the smaller fighters I don't think would do to well. Guys like GSP similar have too many options available to win. At least in the lightheavy division stand up fighers with power have had success.
True, It would be interesting to see someone like Jim Jeffries who wrestled quite a bit in his youth as well as boxed, participate in a similar event.
Rocky Marciano? Dempsey? Louis perhaps? Not sure about Ali though, he had no answer vs that guy that fought on his butt for 15 rounds.
Well, if you can punch hard and have an iron chin, you can be the undisputed heavyweight champion of the world. Doesn't mean you will, nor does that mean that that is the ONLY combination of skills/attributes that will make you a champion. It's much easier said than done. Liddell is a lightheavy, not a heavyweight. I don't think Liddell was one-dimensional, anyways. Calling him "a big puncher you can't take down" is selling him WAY short - "big power" of the Liddell variety is a combination of power, speed, and technique (which is also highly prized in boxing and guys like Hearns get nuthugged endlessly for it) and his takedown defense, while simple, was far from easy. If fighting like Liddell was THAT easy then why has nobody else been able to do it as effectively as he did during his run? Cintron is probably too small to fight in the UFC. He'd be a small LW in MMA and he might lose his extraordinary power/speed if he bulks up to gain strength for the wrestling/ground game of MMA. He does have a legitimate wrestling background, though.
I understand that MMA is dominated by wrestlers and graplers. Being a world class boxer on top of that cant hurt. I would suggest: Jim Jeffries Paul Berlenbach
Ali, Marciano and Louis would not have done very well. Tyson would fare relatively better but he would also lose. Johnson is the best name forwarded so far, and an even better choice than Jeffries or Dempsey. How about Langford or Hopkins? Roy Jones also strikes me as the type of talent that could potentially transcend different sports, but his chin would be a major liability. I'm more wary of him getting knocked out than getting taken down in a sport like MMA to be honest.
Ali's speed of foot would've made him better suited than any of those you just mentioned, as they'd be within range at all times for clinches, takedowns, knees, kicks, etc.
Who was that kickboxer who lost to Randallman, that mean looking kid who used to impress the commentators with his vertical leaps before matches? His name escapes me at the moment. I think it his first name was Maurice.
Whats often forgoting is Dempsey and Marciano were pretty good street fighters, I belive Louis would do better also.