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College football rankings after Week 4: Updated Coaches Poll. AP Top 25 for Big Ten

Week 4 delivered massive Big Ten drama as Oregon defeated USC 41-27 in Los Angeles, though Dante Moore suffered a severe hit that sparked strong condemnation from Dan Lanning. Meanwhile, Iowa shocked Michigan 20-19 on a walk-off touchdown, snapping Kyle Whittingham's undefeated streak in Ann Arbor, and Lee Beebe Jr.

rescued Indiana from an upset by Northwestern. Elsewhere, Ohio State crushed Illinois behind four touchdowns from Jeremiah Smith, Luke Fickell earned a notable win against Penn State, and Notre Dame defeated Purdue.

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