NEW YORK — No doubt about it, LSU is No. 1.

As for the rest of the Top 25, five wild weeks of college football have taken quite a toll.

The Tigers were a unanimous choice for the top spot in The Associated Press rankings released Sunday, receiving all 65 first-place from the media panel. The last unanimous No. 1 during the regular season was Ohio State in December.

LSU is one of just four teams that started the season ranked in the top 10 and remain there. The others are No. 6 Oklahoma, No. 8 West Virginia and No. 10 Southern California, which became the latest team to take a tumble after a startling loss to an unranked opponent.

The Trojans fell to Stanford 24-23 on Saturday, then dropped eight spots in the rankings.

California is the new No. 2, with its best showing in the AP Top 25 since 1951, when the Golden Bears were No. 1.

Ohio State is No. 3, and No. 4 Boston College has its highest ranking since Doug Flutie had the Eagles fourth in 1984. South Florida, which entered the poll for the first time three weeks ago, is now No. 5.

A week before the first Bowl Championship Series standings are released, LSU is a unanimous No. 1 in all the major polls. In the coaches' poll, the rest of the top five is California, Ohio State, Boston College and Oklahoma and South Florida are tied for fifth.

In the Harris poll, the top four are the same as the AP and coaches' poll, but Oklahoma holds the No. 5 spot all to itself with USF sixth. The Harris and coaches' polls are part of the formula to determine which teams will play in the BCS national title game Jan. 7 in New Orleans.