1. Brock Lesnar (5-1) UFC Champion (pictured)
This may not be popular, but to any MMA fan who is able to be honest with themselves, Lesnar is the No. 1 Heavyweight at this point in time. He is the only Heavyweight with two top 10 wins in his last two fights.
To those upset about Lesnar being ranked No. 1, relax. Veasquez is likely going to take over this spot in a few months.
2. Fabricio Werdum (14-4-1)
Fabricio has likely reached his peak as a MMA fighter with this #2 ranking. He has the best Jiu Jitsu in the heavyweight division and is the most technical heavyweight on the ground. His shocking submission of Fedor will live on in MMA history. While he likely should take the fight with Overeem, M-1 is pushing for the rematch with Fedor. His total lack of striking makes it unlikely he will repeat the upset, but Werdum's skills on the ground are a danger to any heavyweight.
3. Fedor Emelianenko (31-2, 1 NC)
The Russian powerhouse suffered his first loss in 7 years, and what made it most shocking was the fact that Fedor, a very accomplished Judo and Sambo fighter, made rudimentary grappling errors. Fedor is pushing for a rematch with Werdum, but somehow a title match with Overeem is still on the table, reportedly.
4. Cain Velasquez (8-0)
The next challenger for Brock Lesnar, and likely the most dangerous fighter in the Heavyweight division to the current UFC Champion. Velasquez has equal, if not superior wrestling, and has very crisp and powerful boxing. At age 27, Velasquez seems poised to take over the division.
5. Junior dos Santos (11-1)
This Team Blackhouse prospect represents the other great heavyweight in the making in UFC. Dos Santos has powerful and lighting quick hands and is close to earning his black belt in Brazilian Jiu Jitsu. Even younger than Cain at 25 years old, it's possible dos Santos-Velasquez could be a great UFC heavyweight rivalry.
6. Shane Carwin (12-1)
MMA fans finally got to see Carwin go into the second round, and all those cardio questions came home to roost. Carwin showed off powerful striking in his challenge to Brock Lesnar, but he seemed to forget his wrestling and never even attempted to control Lesnar on the ground. When put on his back, Carwin had very little. Carwin has a place as a relevant KO artist, but at 35 years old, he likely only has one more run at a title his future.
7. Alistair Overeem (33-11, 1 NC) Strikeforce Champion
After finally defending his Strikeforce belt after 3 years of fighting anywhere but the US, Overeem has announced he is taking time off from MMA. He is looking to enter this summer's K-1 Tournament in Japan, and we may be lucky to see him fight again this year.
8. Frank Mir (13-5)
The former UFC champion appears to be on the decline. The mobility and agility that made him such a threat on the ground seems all but gone as he has bulked up. Mir certainly has the skill, athleticism and experience to challenge any Top 10 heavyweight, he just needs to go back to his Jiu Jitsu.
9. Antonio Rodrigo Nogueira (32-6-1, 1 NC)
This former Pride FC and UFC champion is in full decline and is far more likely to be full time coaching in a year than in the title picture. An all-time great, Nog is likely to get a fairwell tour and then retire in the next year or two.
10. Antonio Silva (14-2)
Silva is the odd man out in the Strikeforce title picture, possibly ready to challenge for the title. There just doesn't appear to be anyone for him to fight. Werdum and Fedor want to rematch and Overeem wants to play kick-boxer in Japan.
Josh Barnett, Roy Nelson, Brett Rogers, Andrei Arlovski, Ben Rothwell