How quickly did his power go down in fights? I think it lasted for the first 3 rounds and then went down to above average the rest of the way.
Mike was a 5 round KO artist. He set his KO's up with fast combos. Past 5 rounds he got tired and couldn't throw as many shots. But he did have some very good 1 punch KO's. Mike was always very strong though,many opponents said that he was hard to push away. After five rounds he stood more straight up and became a 1 punch stalker. He was the best 1st round fighter ever in the heavyweight division too.
He had KO power all 12 rounds... later in his career he wasn't in the same kind of shape, and would gas after the early rounds. In his hayday, he had enough fuel to go all 12 rounds and throw bombs.