Hello Irene and another fun match up! Iron Mike Tyson seemed unbeatable at one time during his career as he had those fast vicious punches which often left his opponent on the canvas as if they had been ht by a train! Cleveland Williams is also known for his awesome power as well and had 58 knockouts in his career with probably the most impressive being a 7th round KO of Ernie Terrell. He was all standing about 6'3" and had an 80" reach too. As you said, Tyson had decision wins against Tucker and Bonecrusher Smith and was also severely tested against Razor Ruddock too and I don't believe any of these guys were in the same league as a prime Big Cat Williams who was not only powerful but a fast and agile boxer too so this is how I see this fight going:

The fight

Tyson comes out strong against Williams looking to end matters early but is caught with some good shots as Williams also came to fight and is not scared of the intimidating Tyson. In the early rounds both men would trade evenly but Tyson is getting tagged with the cleaner shots as the fight goes into the latter rounds. After a hard exchange in round 11, Williams lands a bone crunching left right combo sending Tyson down to the canvas. Tyson makes it to his feet but is in no shape to continue as the referee halts the contest.

Winner Williams TKO11

I think Williams would have beat Mike, Tyson wasn't much good against an A level fighter and the pre-gun shot Williams was an A level fighter. Mike quit on his stool to end his career, something no true great would have done. Williams by KO a couple rounds later than it took Holyfield to KO Mike.

This would be a good fight for Mike, as Cleveland had very good power, and was a powerhouse for a short period of time.However, this was probably the best version of Mike, so I'm thinking Tyson's quickness seals the deal after a couple of rough spots, in the 5th round.

The Williams that knocked down Liston, was very fast and one of the hardest punchers in history.

His size would allow him to keep Tyson off and frustrate him to the point of winning the fight.

It might go the distance where the Big Cat would win easy or he might stop Tyson in 8 rounds.

Lester...I respect YOU and your boxing knowledge but, I believe Liston was only floored twice in his career, one being May 25, 1965 in Lewiston and the other time vs/Leotis Martin Dec. 6, 1969 in Vegas. True Williams hurt Liston, but Liston blitzed him in both fights.

tyson much too fast for williams and hit as hard as liston im tired of people that have no knowledge of tyson at his peak asking stupid questions williams was a good fighter but was slower than tyson he was like liston he had a big punch but no speed

This version of Big Cat was before he was shot by a Texas Deputy in Nov 1964. This Williams traded blows with Sonny Liston and even broke his nose in their first meeting in 1959, before he was knocked out by Liston in round 3. In their rematch in 1960, again Williams was knocked out in round 3. Big Cat drew with Eddie Machen. Williams has a knockout victory in 7 rounds over future WBA Heavyweight Champion Ernie Terrell. Iron Mike is deceptively quick for a small heavyweight. He has knocked out Trevor Berbick, and an aged Larry Holmes in 1988. He has decisioned James Bone Crusher Smith and Tony TNT Tucker. Iron Mike can hit. Who would win and why?