We’re down to just two. And after next weekend, only one will be left standing.

Five B1G teams entered Week 4 with an undefeated record, but three of those teams — Indiana, Minnesota and Iowa — and dropped their B1G opener on Saturday. That leaves Ohio State and Penn State as the only remaining unbeatens.

And next weekend, those two teams go head-to-head in Happy Valley. The lead in the B1G East, a spot in the CFB Playoff conversation and, of course, the top spot in our power rankings are on the line next Saturday inside Beaver Stadium.

But let’s not get ahead of ourselves. Here’s the B1G power rankings following Week 4.

14. Rutgers, 1-3 (lost to Buffalo 42-13)

It’s probably safe to assume that Rutgers will be chained up in the B1G cellar for the remainder of the year. It’s hard to imagine the Scarlet Knights win another game. Will they even be competitive? After blowout losses to the likes of Kansas and Buffalo, it seems unlikely.

13. Nebraska, 0-3 (lost to No. 19 Michigan 56-10)

Everyone knew Scott Frost was inheriting a mess in Lincoln. We just didn’t know how big it was. Saturday’s blowout loss to Michigan shined some light on that. Frost himself said that the program has hit “rock bottom” after such an embarrassing outing in Ann Arbor.

12. Illinois, 2-2 (lost to No. 10 Penn State 63-24)

For three quarters, Illinois really gave Penn State a run for its money. Even held a 24-21 lead in the third quarter. But there’s still a huge talent differential between the Illini and the top-tier teams in the B1G. Illinois comes in at a low spot, but it’s in a better position this season than we might’ve thought.

11. Minnesota, 3-1 (lost to Maryland 42-13)

A pretty disappointing outing for Minnesota after a 3-0 start to the season. The Gophers couldn’t get anything going offensively and gave up way too many big plays. P.J. Fleck’s team is a lot different without Rodney Smith in the lineup. The injury to Antoine Winfield Jr. didn’t help, either.

10. Northwestern, 1-2 (bye week)

We can re-evaluate Northwestern next weekend. Maybe the Fighting Fitzgeralds used the off week to fix some of the glaring issues.

9. Purdue, 1-3 (def. No. 23 Boston College 30-13)

Purdue finally finished a game and picked up a win over No. 23 Boston College. That was the first time the Boilermakers had defeated a ranked team since 2011. Now that they’ve gotten that first win, can the Boilers rattle off a few more and be competitive in the West?

8. Indiana, 3-1 (lost to No. 24 Michigan State 35-21)

Saturday night might’ve served as a bit of a reality check for Tom Allen and Co. The Hoosiers rushed for just 29 yards against the Michigan State defense and struggled to get anything going offensively. While the Hoosiers were competitive, they found out it may not be quite as easy to run the football in the B1G.

7. Maryland, 3-1 (def. Minnesota 42-13)

Another impressive win for Maryland makes you just scratch your head even more at last week’s flop against Temple. The Terrapins ripped off big play after big play against the Gophers. All five offensive touchdowns were from 20+ yards out, including an 81-yard run from Ty Johnson, a 54-yard pass from Kasim Hill to DJ Turner and a 64-yard run from Anthony McFarland. That talent is starting to shine.

6. Michigan State, 2-1 (def. Indiana 35-21)

Defense continues to be the key for Michigan State. Offense continues to be iffy. The Spartans scored on a pick-six and on a fake field goal attempt, essentially the difference in the 14-point win over the Hoosiers. The defense can win a lot of games for MSU this season, but it won’t compete for a championship unless the offense starts showing some major improvement.

5. Iowa, 3-1 (lost to No. 18 Wisconsin 28-17)

Even in a loss, Iowa proved it’s one of the better teams in the B1G. The Hawkeyes had two red zone trips that resulted in just three points, which turned out to be costly. Yes, Iowa has an uphill battle, but don’t count them out of the race in the West just yet. That defense is really good and can keep the Hawkeyes in every game on the schedule.

4. Wisconsin, 3-1 (def. Iowa 28-17)

You couldn’t have scripted a better outcome for Wisconsin. Alex Hornibrook led the offense on a 10-play, 88-yard drive and fired a game-winning touchdown pass to A.J. Taylor with under a minute left in Kinnick Stadium. It was the perfect response after the miserable loss to BYU in Madison last Saturday. The Badgers are back to being top dog in the West.

3. Michigan, 3-1 (def. Nebraska 56-10)

The rushing attack in Ann Arbor is really turning into something special. The Wolverines still have to prove they can do it against a quality defense, but they totaled 285 yards on the ground against Nebraska. Michigan looks better every week and that loss to Notre Dame is beginning to seem irrelevant.

2. Penn State, 4-0 (def. Illinois 63-24)

Best second half team in the nation? Penn State hasn’t been overly dominant in the first half of games this season, but it really flexes its muscle in the final two quarters. The Nittany Lions scored 42 straight points on the Illini after trailing 24-21 early in the third quarter. That’s just insane. Penn State will have its chance to move up next weekend when it gets a showdown with Ohio State.

1. Ohio State, 4-0 (def. Tulane 49-6)

Dwayne Haskins didn’t even take a snap in the second half, that’s how overpowering the Ohio State offense was again. The defense looked pretty good too, even without Nick Bosa on the field. That’s a really scary thought. The Buckeyes have another huge test next weekend, traveling to Happy Valley to take on Penn State in a prime time showdown. Will Ohio State be able to maintain its spot atop our power rankings?