Trent Richardson moves to No. 2 in our Heisman vote. (Justin Molush/Creative Commons)

Wow.

That's all I have to say.

This weekend saw three of the top five teams in the country fall, and the Heisman race is suddenly wide open. With only a few weeks left, let's see how the race stacks up.

1. Andrew Luck, QB, Stanford

Though Luck hasn't been super impressive lately, he has built the résumé to stay on top. He now leads the team with the best record in the Pac-12, and he is completing 70 percent of his passes and has 31 touchdowns. If they finish the season with one loss, I think the trophy is his to lose.

2. Trent Richardson, RB, Alabama

Last week I had Brandon Weeden here. Well, needless to say, that didn't last too long. His loss is Trent Richardson’s gain. He had a huge game against Georgia Southern, and now has 20 touchdowns on the ground. The Tide are ranked second in the country; he still has a chance to get to the top of this list if Luck falters.

3. Robert Griffin III, QB, Baylor

No one has moved up as much as Griffin has this week. His win over Oklahoma was his signature moment. He threw a game-winning touchdown pass to beat Oklahoma for the first time in school history. Oh, and he also has 33 touchdown passes and has only five interceptions. He is playing unbelievable football.

4. Case Keenum, QB, Houston

He has 38 touchdowns. He has three interceptions. He's undefeated. Enough said.

5. Matt Barkley, QB, USC

Barkley got his signature win Saturday night against the mighty Oregon Ducks on the road. He played one of his best games ever, throwing for 323 yards and four touchdowns. He now has 33 touchdown passes on the year. Just for reference, when Matt Leinart won the trophy, that's as many as he had. USC is back, and Barkley deserves the recognition.

In the running: Montee Ball, RB, Wisconsin; Brandon Weeden, QB, Oklahoma State; Justin Blackmon, WR, Oklahoma State; Russell Wilson, QB, Wisconsin; Colin Klein, QB, Kansas State