The surprises have begun, and the little guys are moving into the Associated Press poll.

After ranked teams started the season 21-0, five fell to unranked opponents this weekend, shaking up the media poll released Sunday.

While No. 1 Southern California and No. 2 Oklahoma had no problems holding on to the top two spots with lopsided wins, four teams fell out of the rankings — Kansas State and Missouri from the Big 12 Conference and Clemson from the Atlantic Coast Conference and Oregon from the Pac-10.

They were replaced by No. 19 Fresno State, which won at K-State, No. 23 Boise State from the Western Athletic Conference, and No. 24 Louisville and — for the first time — No. 25 Memphis from Conference USA.

“Mid-majors are starting to come up, and good things are happening,” Fresno State defensive end Garrett McIntyre said. “We want BCS bids, and we think we can get them, but we have to go undefeated in order to do it. I think it’s our time.”

For Fresno State, it’s looking like a repeat of the 2001 season. That year David Carr and the Bulldogs knocked off three teams from marquee conferences and made a run at breaking into the Bowl Championship Series.

“This team still has a long way to go,” Fresno State coach Pat Hill said. “Both teams are different, but they play with the same hunger and aggression. We’ve just got to keep playing like this.”

Saturday’s Fresno State win in Manhattan followed a victory at Washington six days earlier.

Boise State extended the nation’s longest winning streak to 13 games by beating Oregon State, 53-34, Friday. The Broncos finished last season ranked 16th after going 13-1.

“As every coach will tell you, it’s where you end up,” Boise State coach Dan Hawkins said Sunday. “But it’s not like you don’t put any credence in it.”

With Kansas State and Missouri, which lost at Troy on Thursday, falling out of the rankings, it leaves Oklahoma and No. 6 Texas as the only Big 12 teams in the poll. It’s the first time the Big 12 has had fewer than three teams ranked since the league started in 1996.