Kansas remains the nation's top-ranked team, but the Big 12's stronghold on the top of college basketball is over after Baylor's upset loss to TCU.
Gonzaga moved up one slot to No. 2 in the latest Associated Press poll and is followed by Dayton, Baylor and San Diego State to round out the top five.
Here is a look at the Top 25 in full:
5. San Diego State
7. Florida State
8. Seton Hall
16. Michigan State
19. Ohio State
20. Penn State
The almost entirely new-look Top 25 is the result of a week that only further emphasized the small margins between the top and middle of college basketball. Fourteen Top 25 teams lost at least once last week, with five dropping two games.
Duke moved back five spots to No. 12 after a pair of road losses at Wake Forest and Virginia. The Blue Devils were held to 30.5 percent shooting by Virginia, which has rounded back into form of late with six consecutive ACC wins. The defending national champions moved back into the Top 25 at No. 22 this week.
"Losing taught us a lot of things," Mamadi Diakite told reporters. "It's not necessarily bad. ... A month ago we were supposed to be done. ... That's what people were saying, but we just put our head down and focused on what we could control."
Michigan, West Virginia, Colorado and Texas Tech also lost two games apiece. The Wolverines were the only one of the four to hang around in the Top 25, sitting at No. 25 after a home loss to Wisconsin and a road defeat by Ohio State.
Michigan State took the largest leap among ranked teams, moving up eight slots after wins over Iowa and Maryland. The Spartans are now one game behind Maryland for the lead in the Big Ten, a loaded conference that's looking increasingly like it will have 10 teams in the NCAA tournament. Michigan State closes out its regular season this week with a trip to Penn State and by hosting Ohio State.
The Nittany Lions continued their tumble after reaching a season high of No. 9, dropping four spots to No. 20 after a loss to Iowa on Saturday. Pat Chambers' team has lost three of its last four games since reeling off eight straight Big Ten wins.
The Big Ten has eight teams in the Top 25 after Illinois and Wisconsin moved back into the Top 25 this week.