IOWA STATE 80, OKLAHOMA 69: Scott Christopherson scored a season-high 25 points and Chris Allen added 16 as Iowa State strengthened its hold on fourth place in the Big 12 Conference by completing a season series sweep over struggling Oklahoma in Ames, Iowa.

Iowa State (19-8, 9-5 Big 12) used a 12-2 run early to take a 14-8 lead and the Cyclones never looked back in handing the Sooners (13-13, 3-11) their sixth straight loss. Christopherson and Allen combined to go 9-15 from 3-point range as Iowa State, the league's top 3-point shooting team, finished 11-22 from behind the arc.

Melvin Ejim contributed a double-double for ISU with 10 points and 14 rebounds before he was ejected with 4:31 left in the game for shoving Oklahoma's Carl Blair and was called for a flagrant foul. Percy Gibson came off the bench to chip in 11 points and seven rebounds for the Cyclones.

Cameron Clark led the Sooners with 16 points while Blair and Sam Grooms added 12 each.

GAME NOTEBOOK: Iowa State shot 52 percent from the field and in two games against Oklahoma this year, connected on 26 3-pointers. Steven Pledger, OU's leading scorer who is fourth in the Big 12, was limited to just seven points on 2-11 shooting. ISU has now won five straight Big 12 home games for the first time since 2003-04 when the Cyclones won seven in a row at Hilton Coliseum.