Andrea Riley had 23 points to lead Oklahoma State (No. 17 ESPN/USA Today, No. 18 AP) to an 82-62 victory over Kansas 82-62 Wednesday night in the Big 12 women's tournament.
Oklahoma State (24-6), which won the only regular-season meeting between the teams by five points Jan. 9, shot 50 percent from the field and hit eight 3-pointers.
The Cowgirls advance to Thursday's semifinal against Texas, which upset Baylor (No. 8 ESPN/USA Today, No. 9 AP) 76-61 earlier Wednesday.
Kansas (16-15) trailed 49-41 early in the second half when Krysten Boogaard was forced to the bench with her fourth foul and 16 points. Seconds later, Danielle McCray was whistled for her fourth foul and joined Boogaard on the sidelines.
With the Jayhawks' best two scorers looking on, Oklahoma State went on a 16-2 run to take a 64-43 lead with 10 minutes left.
The 82 points were the most the Jayhawks have given up all season.
Taylor Hardeman scored 15 points, Maria Cordero had 14, Shaunte' Smith had 12 and Danielle Green had 10 to lead a balanced Oklahoma State attack.
McCray had 18 points and 12 rebounds and Boogaard finished with 17 points for Kansas. LaChelda Jacobs added 15 points for the Jayhawks, who can do nothing but await word of a possible WNIT bid on Monday.
Oklahoma State hit only 12-of-22 free throws but converted the Jayhawks' 18 turnovers into 20 points, the final margin on the scoreboard.
McCray came out on fire for Kansas, scoring seven early points to give Kansas an 11-8 lead. But after the teams traded baskets, Oklahoma State used a 10-0 run to turn a 14-13 lead into a 24-13 advantage midway through the first half.
The Jayhawks' offense continued to sputter as Oklahoma State doubled up Kansas at 38-19 late in the second half before the Jayhawks closed the half on a 12-5 run to trail 43-21 at the break.