The 400 pound was a figure speech.
Too heavy or out of shape, affects your mobility,agility and your speed.
Makes you a easy target. Guess you didn't know that.
A real fight means no rules.
Mercer was about the same weight with about 6 inches less height, he is also close to fifty and has been shot for about twenty years. Tim was fighting the best heavyweight in the sport a few fights back, he is slightly past prime at best.
Tim has been clocked a few times by lesser strikers, he circled right on to Ray's lead hand, that has nothing to do with his weight. What it has to do with is his lack of defence.
UFC has lots of rules, most of which favor wrestlers. It's a controled enviroment just like all combat sports.
You put a top striker against a top grappler in a street fight and neither knows who the other is and the grappler gets K.O very quickly. Striking is for men, grappling is effective, but it's not pleasing to watch and is basically saying, i'm scared to get hit. Judo is a great grappling based sport that doesn't fit in to that sentiment.
Funny thing is Rampage said the exact same thing in an interview recently.