Related coverage: OU vs. South Dakota
Oklahoma dropped a spot in the AP Poll released Sunday afternoon. The Sooners checked in at No. 5 after being ranked No. 4 the previous two weeks.
LSU, after its 45-38 win at Texas, jumped from No. 6 to No. 4. Texas fell from No. 9 to No. 12.
The Sooners (2-0) cruised past FCS opponent South Dakota 70-14 Saturday night in Norman.
The top-three teams in the poll — Clemson, Alabama and Georgia — remained unchanged.
The Sooners and Longhorns are the only ranked Big 12 teams, but Iowa State, TCU and Oklahoma State all received votes.