Can You Guess Who I Am?

As I sit here, bored out of my mind in third period study hall, I thought I may interest you in a quick game of "Who Am I?"

Let's just lay down some quick ground rules.

1. I'll give five clues. As soon as you KNOW who it is, leave your answer in the comments section. Also leave the clue number that made you certain your answer was correct. Be honest. If you don't know, tell me you don't know.
2. In the interest of fairness, use your own knowledge. No Wikipedia, no Sherdog or any other search engine or means of cheating. I am making this list off the top of my own head.
3. If someone has already taken your answer, just agree with them in a response.

Now that we know the rules, lets play the game.

Clue 1

I currently fight in the UFC. I made my UFC debut in 2006 and quickly became a fan favorite.

Clue 2

I currently hold an overall record of 25-9. I've won just one title in my career, and did not successfully defend it.

Clue 3

At 155 pounds, I have accumulated a UFC record of 5-3. My frantic pace and overall skill level have earned me two "fight of the night" awards.

Clue 4

I currently am on a three-fight win streak, proving my "gatekeeper" status, while also showing my abilities may be worthy of a championship.

Clue 5

I'm not known for finishing fights, but all the fans love to see me and my hair dominate the octagon for all three rounds.

Good luck, guys.