I'm far from a Lesnar fan but this is one fight the big lummox would win 98/100 times. 1) No TDD = kiss of doom against a wrestler, nevermind an insanely strong and large wrestler like Lesnar 2) Tyson's boxing stance is all wrong for MMA. Against a wrestler you're offering your lead leg for a single leg TD. Against a striker you're offering your lead leg to get beaten to a pulp by low kicks. 3) Lesnar didn't like getting hit, but he had enough of a chin on him to take bombs and keep fighting. He withstood a murderous assault from Carwin and came back to win. Tyson would do well to land something on him in the split second it would take to ground him. Once it hits the ground Brock will smother Tyson with his big oily pecs and ham-fist him into submission and it would look ugly. Boxing fans are deluding themselves that "one punch from a boxer" will take care of an MMA fighter. Some MMA guys can throw hands as hard as boxers - maybe harder because they don't have to worry about high level countering so much - and even with their ridiculously small gloves 1 punch KO's are not that common.