Mixed Martial Arts has evolved immensely since its creation. Pound-for-pound rankings are never without controversy because there is no way of telling who truly is better. The list you will see below involves each fighter's record, quality of opponents, dominance, and skill level to determine their rank.
No. 1: Fedor Emelianenko
Emelianenko has a record of 29-1. His only loss was controversial, too. It was the result of an illegal elbow, but due to tournament rules, he was given the loss. While he was in Pride, he fought and beat all competitors in dominating fashion. Now signed with Affliction, he has had two crushing victories over former UFC champs.
No. 2: Georges St. Pierre
St. Pierre is one of the greatest athletes in MMA, if not the greatest. He is the current UFC Welterweight Champion, achieving a record of 18-2. He has dominated his last five opponents, including No. 1 ranked lightweight, B.J. Penn.
No. 3: Anderson Silva
Silva is one of the most feared strikers in the world, and has a dangerous jiu-jitsu game to go with it. He is 8-0 in the UFC, finishing all his opponents decisively. The only problem with Silva is the quality of opponents he has faced.
No. 4: Miguel Torres
Torres is the WEC Bantamweight Champion and has a record of 35-1. He is a very well-rounded fighter, who will look to defend his belt against Brian Bowles.
No. 5: B.J. Penn
Penn is a born fighter. He is 13-5 and the current UFC Lightweight Champion. Penn is willing to fight anybody. He proved that when he moved up to fight at Welterweight and even had a fight with 205-pounder, Lyoto Machida.
No. 6: Rashad Evans
Evans won season two of the Ultimate Fighter, and is now the UFC Light Heavyweight Champion. He is still undefeated, and an amazing wrestler with knockout power.
No. 7: Quinton Jackson
"Rampage" is a former UFC Champion. His only loss in the Octagon is a controversial decision to Forrest Griffin. He rebounded with a win over nemesis Wanderlei Silva. Jackson will be looking for another win when he fights Keith Jardine in March.
No. 8: Urijah Faber
Faber is the former WEC Featherweight Champion. His only losses are to Tyson Griffin and Mike Brown. He is coming off a quick win over Jens Pulver.
No. 9: Thiago Alves
Under the radar until through 2007, Alves blew onto the scene in 2008 with knockout wins over Matt Hughes and Karo Parisyan. A win over Josh Koscheck cemented his spot as the No. 1 contender for the belt.
No. 10: Lyoto Machida
Still undefeated, Machida is able to beat anyone placed in front of him without even getting hurt. He looks to get a title shot later this year.