5 wins (3 by strikes or by knockout, 1 by submission, 1 by decision),
1 loss (usbmission).
Brock Lesnar just faced the biggest, scariest fight of his life. After surviving a brutal pounding in round one, Brock did something that nobody expected: beat Shane Carwin by a submission hold. This was the first fight we've ever seen Brock really and truly go for a submission.
So with wins over Frank Mir, Randy Couture, and Shane Carwin, the Champion is no slouch when it comes to top-level competition. But it's not about crunching numbers and seeing how many top fighters Brock has beaten that makes him the best. Brock Lesnar has shown us that there is nobody in the world today that can beat this man, and that is what makes him No. 1.
With an iron chin, excellent cardio, a scary good wrestling arsenal, and finally the last piece we needed to see to really believe in Brock—a highly effective submissions game. We've just seen Brock get hurt very badly and recover from it. That says a lot about his durability and heart.
For anyone who is unhappy about a five-win and one loss fighter being ranked No. 1 in the world, don't worry. The big tests are going to keep coming, with Cain Velasquez up next. If victorious, Brock will then be tested by either Junior dos Santos or by Roy Nelson.
After that, who can say? Perhaps Fedor or Overeem or Werdum will come to the UFC and take a shot at beating Brock Lesnar. It's not going to be an easy road for Brock. He's going to face the most dangerous challengers in the world, and the UFC isn't pulling any punches. The longer he remains the UFC Heavyweight Champion, the more he will do to silence all doubters.
One thing that I was extremely happy to see was Brock Lesnar being humble and gracious in victory. It seems there's real hope that Brock will behave like a true champion.
In this writer's opinion, Brock Lesnar just cleared the biggest hurdle by facing his biggest threat in Shane Carwin, and he did it after recovering from diverticulitis and after a year without a fight. Brock is still somewhat raw, but he's continuing to learn and grow as a figher. I think Lesnar will break the UFC heavyweight record of two consecutive title defenses—a mark that he just tied.
Hail to the new king!