Florida has ascended to the top 10. Michigan and Penn State have dropped from the rankings. The AP Top 25 poll has underwent significant changes after Week 4. LSU and Florida have risen in the rankings, while Michigan, USC, and others have declined in position. New polls indicate setbacks for Ole Miss and Tennessee. ESPN and other sites have updated the rankings, with Mississippi possibly leaving the top 5. Several ranked teams lost in Week 4, causing significant changes.