Defeating Couture, Mir, and Carwin in a row is a prime and if you don't think so you're spitting on every fighter he beat. Remember Couture had just beaten Silva and then Gonzaga. Carwin was the #1 contender and had finished all his fights by knockout in the first round. He constantly claimed "If I touch Lesnar he'll go to sleep. People thought he hit harder than Lesnar. Well he "touched " Lesnar about 60 times in a row just as hard as he possibly could and all he got from that was tired! Lesnar showed amazing toughness and an iron chin in that fight. After that, diverticuitis ruined the rest of his career. To this day nobody has surpassed Lesnar's two consecutive successful defenses of the UFC HW Title.