A second September loss has Notre Dame on the outside looking in at both polls after five weeks.
The Irish fell from No. 22 to unranked after their 35-21 home loss on Saturday to then-No. 14 Oklahoma, which moved up to No. 11 in the Associated Press poll and No. 10 in the USA Today coaches' poll with the win.
Notre Dame had not been unranked in the AP poll since the 2012 preseason poll. It had not been unranked in the coaches' poll since the end of the 2011 season, when it was unranked in both polls.
The Irish's upcoming opponent, Arizona State, jumped to No. 22 in the AP poll and No. 24 in the coaches' poll.
Notre Dame received 12 votes in the AP poll, good for 31st overall, and 29 votes in the coaches' poll (30th).