Tom Szczerbowski-USA TODAY Sports
This category is extremely close, but in terms of pure grappling and submission ability, one of these men is the most dangerous in the heavyweight division.
Caution and care need to be taken when on the ground with Mir, as his guard is dangerous and his offensive top-game ability is just as hazardous. His submissions of Brock Lesnar, Pete Williams and especially Antonio Rodrigo Nogueira were all brutal, a testament to the fact that he is willing to take limbs home with him in the cage.
Barnett, who is also a Brazilian jiu-jitsu black belt, has more submissions than Mir has wins in MMA. However, it should be noted that although Barnett has more tapouts, Mir has earned his tapouts against higher level foes.
In a close race, Mir snags the edge.