If Brock Lesnar gets hold of him, in terms of grappling it might just be over, real real quick. 6 ft 7 Deontay Wilder is a massive puncher with boxing gloves, with UFC gloves however, if he lands once, Lesnar will be in critical condition. Who you think wins. I would ofcourse learn towards Lesnar but you never know lol.
(Above, Deyontay Wilder KO'ed Arthur Szpilka, the victim laid down, and was taken to the hospital like this)
(This guy gets dropped and hit so hard his nervous system has some sort of failure or breakdown)
It is a very weird match up. Wilder is not polished with his boxing skills though. He is not as good with his skills, movement and reflex as Floyd Mayweather Jr was 3 years ago. But he is still a Bronze medalist and with that type of power he can kill someone with those UFC gloves.