DENVER-- An already wacky postseason for many classes in Colorado high school football has the potential to get even crazier this weekend.

Several low seeds have advanced much farther in the bracket than originally anticipated, and four in particular have the opportunity to continue their miracle runs Saturday.

In 5A, No. 7 Cherry Creek shocked everyone when the Bruins knocked out No. 2 Mullen with a convincing 34-17 win in the quarterfinals on November 18. This weekend, Creek will hope to continue surprising people when the team goes up against defending state champion and currently No. 3 ranked Valor Christian. This will be a rematch, where the Panthers edged the Eagles in the final minute back in September.

4A football hasn't been any less difficult to comprehend.

Despite winning the state championship last year, Windsor came into the 2016 playoffs as a No. 8 seed with three losses on the season. But, in the quarterfinals, the Wizards stunned No. 1 and still undefeated Denver South. On Saturday, Windsor will look to get back to the state title game by beating No. 5 Broomfield.

We already saw this game, too. The Eagles defeated the Wizards 37-25 in September. The other 4A game, Chatfield versus Pine Creek, will also be a rematch of the first game of the season. The Chargers won, 50-39.

3A has seen perhaps the most madness of any other class, as No. 11 Mead has advanced all the way to the state semifinals. The Mavericks upset No. 6 Palmer Ridge in the first round, before sending home No. 3 Palisade with a nail-biting victory in the quarterfinals. This Saturday, Mead faces its toughest test yet, with a chance to knock out the No. 2 team in the state and the defending champions in Pueblo East.

Finally, a low seed has a chance to not only advance to the state title, but actually win a state championship this Saturday.

No. 6 Kent Denver has stormed through the 2A playoff bracket, and can cap off an impressive run with a trophy if the Sun Devils beat No. 1 La Junta.

These four schools have already shaken up their respective brackets. Now, which one has the best chance to pull off an even bigger upset this weekend?

Click here or on the link below to vote on our poll, and Tweet us at 9News Prep Sports with #9PrepsUpset to let us know which school is most likely to win on Saturday.