Notre Dame moved into the top four in the second College Football Playoff selection committee rankings of the season Tuesday night.
Clemson remained No. 1, with Alabama moving up two spots to No. 2, Ohio State staying at No. 3 and the Fighting Irish up a spot to No. 4.
Notre Dame and Alabama each has one loss.
Unbeaten Iowa received an eye-catching promotion, rising four spots to No. 5. Baylor is the highest-ranked Big 12 team at No. 6.
Two previously unbeaten teams tumbled. Louisiana State, No. 2 last week, dropped to No. 9 after losing at Alabama, and Michigan State, which was No. 7, dropped to No. 13.
Takeaways from the second playoff rankings:
• One of the biggest surprises was Iowa's rise to No. 5 after winning 35-27 on the road vs. an Indiana team that is 0-5 in the Big Ten. Committee chairman Jeff Long pointed out the Hawkeyes have beaten two top-25 teams on the road (Wisconsin and Northwestern), and Iowa's strength of schedule is No.2 behind Clemson among the six remaining unbeaten teams.
"It's a recognition by the committee that they were increasingly impressed by Iowa and their body of work," Long said. "Three teams lost ahead of them, so we felt they needed to move up."
• Barring upsets, Notre Dame's promotion to No. 4 would cause the Big 12 to root for the Pac-12's Stanford to knock off the Irish on Nov. 28. That could create room in the top four for the Big 12 champion, whoever it is.
Baylor is the highest-ranked Big 12 team at No. 6 for the second straight week, with Oklahoma State No. 8 after being No. 14 in the first rankings.
Some analysts thought Oklahoma State would overtake Baylor, and maybe even move into the top four, after an impressive 49-29 win at home over previously unbeaten TCU.
The committee still likes Baylor more, even though the Bears are yet to beat a team with a winning record.
"Oklahoma State had a good win," Long said. "That's the first piece of real strength we've seen from them, with that win over TCU."
The Cowboys' fate is in their own hands. They host Baylor on Nov. 21. The Bears play their next three games against teams with a combined 25-2 record.
• Ohio State quarterback J.T. Barrett pleaded guilty to a count of drunken driving and was sentenced to a three-day driver-intervention program. Barrett also was fined $400 and had his license suspended for six months.
• Notre Dame running back C.J. Prosise passed the first test in the concussion protocol testing, but coach Brian Kelly said he still needs to pass another before he is cleared to play against Wake Forest on Saturday. If Prosise can't play, Josh Adams would replace him.
• TCU receiver Josh Doctson was scheduled to see a specialist Tuesday night after injuring his left wrist at Oklahoma State. Coach Gary Patterson said Doctson was feeling better and that he was probable for Saturday's game against Kansas.