Another decisive victory away from home pushed LSU to No. 1 in The Associated Press college football poll for the first time since 2007.
The Tigers bumped Oklahoma from the top spot Sunday after winning, 47-21, at West Virginia the night before.
The Sooners had been No. 1 since the preseason. They stayed unbeaten with a 38-28 victory at home against Missouri.
LSU received 42 first-place votes from the 60-member media panel and 1,471 points. Oklahoma received 12 first-place votes and 1,422 points.
No. 3 Alabama received five first-place votes and No. 4 Boise State had one.
Oklahoma State jumped two spots to No. 5 after winning at Texas A&M.
The Tigers haven't been No. 1 since winning the national championship in 2007. The Tigers held the top ranking for four weeks during the regular season that year.
LSU (4-0) added the victory against West Virginia to wins over Oregon at Dallas Cowboys Stadium and at Mississippi State. All three were ranked at the time the Tigers played them.
Oklahoma certainly hasn't struggled, with wins against Tulsa, at Florida State and Missouri. And losing the top spot in the polls after a victory isn't uncommon. It happened once last season and twice the season before.
For now, the Tigers' resume has swayed voters.
The schedule doesn't let up much for LSU, though the Tigers do play at home the next two weeks against Kentucky (2-2) and No. 12 Florida (4-0).
No. 6 is Stanford, followed by Wisconsin and Nebraska. The seventh-ranked Badgers will welcome the eight-ranked Cornhuskers to the Big Ten on Saturday in Madison, as Nebraska plays its first game in its new conference.
Oregon is No. 9 and South Carolina is 10th.
USC was the only team to fall out of the rankings this week. The Trojans lost to Arizona State late Saturday night.
SEC expands in '12
BIRMINGHAM, Ala. -- Texas A&M is set to join Southeastern Conference, the league said Sunday, apparently signaling that legal hurdles have been cleared for the Aggies to leave the Big 12.
The SEC announced Sunday that the move will be effective next July, and said Texas A&M will participate in all sports during the 2012-13 academic year. That gives the SEC 13 members and its first addition since South Carolina and Arkansas in 1992.
The Aggies' defection from the Big 12 had been held up by the possibility of legal action from Baylor and other members, who would not waive their rights to sue the school and the SEC. The statement released by the SEC did not mention that situation, and spokesman Charles Bloom did not immediately return a call seeking comment.
SEC presidents and chancellors voted in favor of the move Sept. 6.
"We are excited to begin competition in the nation's premier athletic conference," Texas A&M President R. Bowen Loftin said in the statement.
It's unclear if the SEC will add a 14th member for next season or go with unbalanced divisions.
Other rumored possibilities have included the Big 12's Missouri and West Virginia of the Big East.