So the weirdest thing to consider here is that Oregon getting healthy/good is all of a sudden screwing over ND. First, they beat both Stanford and USC. That limits the value of beating Stanford, and worse knocked USC out of the top 25.
But then the kicker is that MSU owns a win over them... and suddenly that's looking like a top 20 win. MSU beat them at a time when Vernon Adams was hurt (he played hurth in their game), and then missed some games where they were would lose by 42 points to Utah and also drop a game to Washington State.
Since coming back to full strength, they've scored 61, 44, 38, and 48 against mostly quality opponents.