Ali would have been great at MMA. He had speed, tenacity, great jaw, an iron will, and mad cardio. Remember, he fought when championship fights were 15 rounds. That's not 25 minutes, that's 45 minutes of ducking, dodging, bobbing, and weaving out of the way of punches from George Foreman, Frazier, Earnie Shavers, Ernie Terrell, Sonny Liston, Ken Norton and many other big punchers. Watch some of his fights and you will see that Chuck would be lucky to hit Ali once. Watch how "The Greatest" glides around the ring hitting his opponent with his left jab seemingly at will. I don't see Chuck winning an MMA fight with Ali either because I see Chuck as someone who would loves to bang.
"DULCE ET DECORUM EST PRO PATRIA MORI"