Nearly half of the nation’s remaining unbeatens saw their perfect seasons severed this weekend as Oregon’s loss to Arizona on Thursday night commenced a record-setting domino effect featuring five of the top 8 teams falling to formidable foes.

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We’ve tried sorting out who’s left and which teams have the best shot at reaching the first College Football Playoff. Based on possibilities the rest of the way, there could be as many as six undefeated teams heading into the postseason — Notre Dame, Marshall and champions from the ACC, Big 12, Pac-12 and SEC.

These rankings do not reflect the current coaches or AP poll order, but instead, an early-season eye test and each team’s individual value based on wins.

RANKING FBS COLLEGE FOOTBALL’S REMAINING UNBEATENS

1. Auburn — In need of a statement win to pull voters back in their direction, the Tigers delivered Saturday night against LSU with a beatdown of Les Miles’ inexperienced — and overrated — football team. Nick Marshall never really left the Heisman race, but jumped back into the Top 3 with a four-touchdown outing. The defending SEC champions haven’t received the notoriety associated with a BCS runner-up, but Auburn’s back in the No. 2 hole just behind those hated Seminoles (according to the AP).

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2. Mississippi State — Dak Prescott and the Bulldogs have made us believers after consecutive wins over Top 10 teams marking the first time in program history that has ever happened. It’s hard to believe this team was 4-6 last November after a loss to Alabama, putting Dan Mullen firmly on the hot seat following his 16th straight loss to a ranked opponent. What a difference a year has made and the overall progression of several players.

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3. Ole Miss — Equipped with the nation’s best defense, the Rebels’ stock has never been higher. Faced with the preseason pressure of getting to the ‘Alabama Game’ unbeaten, Ole Miss handled it well and dominated the opposition. The Rebels shook off a gift touchdown in the second quarter against the Crimson Tide and kept Lane Kiffin’s offense in check throughout, recording one of the best wins in school history. How exciting will the Egg Bowl be this season?

4. Florida State — The top-ranked Seminoles have issues defensively and aren’t playing as well on offense as they did last season with the same Heisman-winning quarterback in Jameis Winston. They lead the polls due to last season’s success, but the margin’s slipping. Much of Florida State’s flaws are disguised against a weak ACC schedule, but an upcoming game against Notre Dame we show us where Jimbo Fisher’s team is at.

5. Notre Dame — Speaking of the Fighting Irish, Everett Golson’s touchdown pass on 4th-and-11 to tight end Ben Koyack upended Stanford on Saturday and kept Notre Dame without a blemish in the loss column. It wasn’t his best game, but Golson’s late-game heroics saved his team’s fast start and sets up a College GameDay-hosted showdown in Tallahassee in two weeks if the Irish can avoid an upset against North Carolina on Saturday. If Notre Dame gets past the Seminoles, it’ll likely be favored in the final five games.

6. Baylor — The Bears are a tough sell based on the competition through five games, but their offense is as good as any team’s in the country when it’s clicking … or is it? Much like Oregon, Baylor’s uptempo attack isn’t as scary against teams with a pass rush. The offensive line will be tested over the final six-game stretch that features four matchups with ranked teams. A Heisman candidate before the season prior to an injury in the opener, Bryce Petty’s still trying to return to 2013 form at the quarterback position.

7. TCU — The coaches poll did the Horned Frogs no favors by putting them behind Oklahoma despite Saturday’s thrilling win, but the AP got it right. TCU’s battle with fourth-ranked Baylor next weekend eliminates one of the two programs from Playoff contention — at least for the time being. If Gary Patterson’s pass-happy squad escapes the Bears, they’ll still have to beat nationally-ranked Oklahoma State and Kansas State along with successful road trips to Texas and West Virginia. The path’s not easy.

8. Arizona — The Pac-12’s highest ranked team is no longer Oregon after Rich Rodriguez’s group upset the ducks on their home field last Thursday. Quarterback Anu Solomon is a talented freshman quarterback who’s trending up, but there does appear to be chinks in the Wildcats’ armor. Arizona’s giving up 26.6 points per game and has won four games by a touchdown or less. The Wildcats scored 36 points in the fourth quarter to beat Cal on a Hail Mary on Sept. 20. Perhaps there’s shades of last year’s Auburn with a little luck in crunch time.

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9. Georgia Tech — The Yellow Jackets, along with Marshall, could unfortunately be the odd team out if there’s six unbeatens at the end of the regular season. Georgia Tech’s ranked wins would come against Georgia and Florida State, but it may be too much ground to make up considering other possible unbeatens — Notre Dame, the Big XII champ, Pac-12 champ and SEC champ — would have have a greater total of quality wins. The selection committee would have a mess on its hands.

10. Marshall — The Thundering Herd’s 5-0 this season with an average margin of victory at 31.8 points per game, but there’s not a single matchup the rest of the way that screams spotlight game. There’s no out-of-conference bout with a Power 5 or ranked opponent on the entire schedule. Quarterback Rakeem Cato is responsible for 16 touchdowns thus far, but he’s not going to get national attention until Marshall plays its bowl game two months from now.