Even in an MMA style fight in the Octagon, Tyson at his peak would beat any 140 pound fighter, not just a phoney one like Bruce Lee. You have to remember that Tyson was a big brute of a man, he wasn't the tallest but he was 230 pounds of solid muscle, aslong as he could avoid taking a kick to the head, once he got hold of any 140 pound fighter he'd over power them with ease. You also have to remember how powerful Mike Tyson's punching power was, even with 12oz boxing gloves on, he was knocking out his opponents in a matter of a couple of rounds in his younger days. So you imagine how much damage those fists would do with the tiny MMA gloves they wear. I think for it to be a fair fight, you'd need an MMA fighter who was more like 170 pounds. 140 pounds is a really tiny weight division. And for anyone who thinks size and power isn't important, look at Brock Lesnars MMA career, the guy could barely punch or kick with any skill, but because he was a genetic freak, and 265 pounds of solid muscle he could easily over power more skilled opponents. Look when he faced one of the greats Randy Coutore who was really a light heavyweight stepping up, Coutore was far more skilled than Lesnar, but because Lesnar had a 40 pound weight advantage which was all muscle, once Lesnar got hold of him he could sap the life out of Coutore. When you have a 265 pound guy on top of you, you ain't gonna move him no matter how skilled you are. And once a guy that big and strong is on top of you, they can just ground and pound you, or squeeze the life out of you. You ain't gonna last very long
Definately Tyson in his younger days, I don't think there are many, if any heavyweights who could have stopped him at his best. I've never seen a heavyweight knock so many opponents out in the first few rounds. Klitschko probably doesn't get enough respect though, mainly because he's quite a boring fighter to watch. And the other best heavyweight of his generation happens to be his brother, which doesn't help eithers legacy when they wouldn't face one another, which I suppose is understandable
