No. 5: Quinton Jackson
Former UFC Light Heavyweight Champion Quinton "Rampage" Jackson has a granite chin, and his ability to absorb shots is one of his greatest assets he brings into the cage.
Three of his losses have been by TKO, and they were to Wanderlei Silva and Mauricio "Shogun" Rua. It takes a lot to put Jackson away, and those fights proved it. He avenged his loss to Silva with a first-round knockout in their third bout.
Don't count on seeing him finished in the Octagon before he retires. His only losses inside the UFC have come by decision, and he's rarely been in trouble of being finished.
He may possibly be the toughest fighter to finish in the 205-pound division.
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