Great Battles: Being tough isn't about potential for being tough; it's about having shown your mettle in great fights. One of the criteria for being a tough guy in MMA is to have fought in great fights that showcased this.
Jaw: If you're easy to knock out, then being deemed tough is going to be hard to come by. Being hard to knock out, plain and simple, is important.
Cardio/Will to Win: Part of being tough is mental toughness. In fact, this may be the single greatest predictor of who we view as tough. Mental strength can be seen through a fighter's cardio- how hard they worked before the fight, and if they keep going when things get tough- as well as their desire and ability to impose their will on an opponent.
Intangibles: A great scowl. Something unusual that sets a fighter apart. The intangibles cannot be discounted.
So without further ado, follow the links below for our top 10 toughest fighters in MMA today.