College Football Power Rankings: Mississippi State, Iowa among risers amid massive shakeup

College football rankings saw a major shakeup after eight ranked teams lost in Week 4. Six new teams entered the top 25, with Iowa defeating Michigan and Texas maintaining its top ranking.
Six new teams enter the top 25 after eight ranked squads fell in Week 4, headlined by Iowa stunning Michigan and Texas proving its No. 1 mettle on the road
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