I'd say his one real weakness is his cardio. He almost always gasses in his fights (unless he KOs them too quickly). However, he still gets second, third and fourth winds. No matter how tired he is, he always seems to summon up the strength to throw out a few powerful combos at any given time.

His ground game is surprisingly good for something with no real background in submissions to speak of. He seems to almost have the same ground game as Fedor: "squiggle around like a little kid." Both their ground games are very odd, yet relatively effective (Fedors MUCH more so than Hunt's, as Fedor has actually trained in submissions).