1. Anderson Silva (24-4)
With another brilliant performance from Georges St. Pierre, and another top heavyweight on the slate for Fedor Emelianenko, the pressure is on Silva to prove he is, in fact, the sports pound-for-pound king. At UFC 101 on Aug. 8, his 205-pound bout with Forrest Griffin will afford him a unique opportunity: a win over the former UFC light heavyweight champion would make Silva the first man in the sports history with top five-caliber victories across three weight classes. He started his career as a standout welterweight before becoming the most dominant middleweight in mixed martial arts history.
2. Georges St. Pierre (19-2)
On paper, Thiago Alves was supposed to be St. Pierres most dangerous challenger to date in the welterweight division. However, Rush dealt with Alves just as he has dealt with other elite welterweights, as he dominated him from bell-to-bell in an impressively one-sided unanimous decision win over yet another top opponent. St. Pierres performance was such that many have started to question whether or not a move to middleweight should be in the cards. However, the next challenger for the sports welterweight ruler will come from either Mike Swick or Martin Kampmann, who will square off in a title eliminator at UFC 103 in September.
3. Fedor Emelianenko (30-1, 1 NC)
Emelianenkos long-awaited bout with Josh Barnett will headline Affliction Trilogy on Aug. 1. Though many have criticized the relative dearth of top heavyweight talent and Emelianenkos opponent selection as knocks against his pound-for-pound status, his fight with Barnett will mark the Russians third consecutive match against a top 10 former UFC heavyweight champion. However, in unfortunate news for MMAs heavyweight king, the fan-proposed guerilla tactic of chanting Emelianenkos name at UFC 100 never got off the ground.
4. Lyoto Machida (15-0)
With his brilliant display of dominance in capturing the UFC light heavyweight title and the 205-pound mantle in May, Machida had already built instant anticipation for a showdown with Quinton Rampage Jackson. However, Jackson instead opted for a second coaching stint on The Ultimate Fighter, which will set up a bout with Rashad Evans. Yet, in a testament to the depth of the UFC and the 205-pound division itself, consensus Fighter of the Year Mauricio Shogun Rua emerged as Plan B for Machidas first UFC title defense at UFC 104 in October.
5. Miguel Torres (37-1)
Theres little rest for a king, and bantamweight ruler Torres is proof positive. After emerging victorious in his thrilling 25-minute war with Takeya Mizugaki in April, Torres will take on undefeated challenger Brian Bowles at WEC 43 on Aug. 9. That show will also feature a de facto title eliminator between hot up-and-comers Joseph Benavidez and Dominick Cruz, the winner of which figures to meet Torres before the year ends -- just like clockwork.
6. Mike Thomas Brown (22-4)
Of any pound-for-pound entrant on this list, Brown may be the least vibrant and least tailor-made for stardom. However, the 33-year-old American Top Teamer remains, without question, the king of the 145-pound world, and reaffirmed it in June when he earned a second win over Urijah Faber. Despite gritting out a 25-minute unanimous verdict over The California Kid, Browns biggest test may be yet to come. His next title challenger come November will be brutal Brazilian dynamo Jose Aldo, possibly the most dangerous fighter the division can offer.
7. Quinton Jackson (30-7)
Many fans and critics still see Jackson through the prism of July 2008 vehicular insanity. However, for whatever poor judgment he has exercised outside the cage, inside it, Jackson is 4-1 against five straight top 10 opponents in one of MMAs deepest divisions. Now, the colorful and charismatic 205-pound standout will captain his second squad of TUFers on Season 10 of The Ultimate Fighter, which will lead up to a high-profile December showdown with fellow former UFC light heavyweight champion Rashad Evans.
8. B.J. Penn (13-5-1)
Talent has never lacked with Penn, only his desire and focus. His desire to move back up to 170 pounds to challenge Georges St. Pierre in January was not only unsuccessful, but it also put the UFCs lightweight class on an extended hiatus. However, the division is poised to get back on track come Aug. 8, when, at UFC 101, Penn will take on a top five challenger, Kenny Florian, in the second defense of his lightweight mantle.
9. Rashad Evans (13-1-1)
The first defense of Evans UFC light heavyweight belt in May was disastrous, as he was dominated from pillar to post by Lyoto Machida. Fortunately for the Greg Jackson pupil, he remains in a star-laden and talent-rich division. Better still, Evans comeback fight will come in a high-profile showdown against a fellow pound-for-pound entrant, as he will take on fellow The Ultimate Fighter 10 coach Quinton Rampage Jackson in December.
10. Jon Fitch (19-3, 1 NC)
Though seldom flashy, Fitch wins. By gritting out a unanimous verdict over tougher-than-expected and previously unbeaten Brazilian Paulo Thiago at UFC 100, Fitch upped his record in the UFC to an impressive 10-1. More importantly, those 11 fights have come in arguably MMAs deepest and most talented division. He may not ever make Sportscenters top 10, but he will likely remain in the welterweight top 10 and beating elite opponents for a good while.
* With Fitchs win over Paulo Thiago and Thiago Alves loss to Georges St. Pierre, the formerly ninth-ranked Alves falls just outside of the top 10.