Mike is and has always been relatively short. He's also a vegan or vegetarian now so a lot of that excess weight has fallen off.
Langford holding the coloured title counts to a lot of us, historically, so Langford and Burns would both be listed shorter than Mike, I think.
If you scroll down your screen until you reach the top of Tyson's head, he is actually a fraction taller than Trout in this photo, which is actually what you would expect given he is 5'10".
tyson is 5'10" and goes about 210. those are 17" arms to go along with a 45" chest. also, like the 5'8" 205-pound barry sanders, tyson carried a considerable amount of weight in his muscular thighs and calves.