Oregon is ranked second in both the AP and coaches polls, and USC is no longer ranked or receiving votes after getting beaten by Washington State at home.
The Ducks play host to Tennessee on Saturday.
Alabama is No. 1 in both polls. Stanford is No. 5 in the AP poll and No. 4 with the coaches.
UCLA is ranked 16th in the AP poll and 17th by the coaches. The Bruins visit No. 23 Nebraska on Saturday.
Washington, which visits Illinois on Saturday, is ranked 19th in the AP poll and 23rd by the coaches.
Arizona State, which plays host to No. 20 Wisconsin on Saturday, is the equivalent of 26th in the AP poll and 28th with the coaches.
Arizona is getting votes in both polls. Utah, which plays host to Oregon State on Saturday, received a vote in the coaches poll.