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A new college football season has begun, which means it's time for another year of The Bottom 25 rankings. Not familiar with the Bottom 25? Well, it's a simple premise.

College football is a sport based on ranking things. The sport boils down to one giant listicle, but for years, all anybody wanted to do was rank the best teams. However, I am a visionary with the courage to ask, "What about the worst teams?!"

The Bottom 25 is a weekly ranking of the worst 25 teams at the FBS level, but unlike the AP Top 25, Coaches Poll or our own CBS Sports 130, these rankings are not based on opinion. I have a mathematical formula to rank teams that I've used for years. There is no bias in the rankings; every season, every team begins at the same point. Alabama is just as good as UConn and the ratings only change based on how teams are performing in the current season.

It's not a ranking meant to be predictive; instead, it's deliberately reactive. I use these rankings to fill out my CBS Sports 130 ballot and to bring you The Bottom 25.

And here is where we stand after the first full week of the 2021 season.