STILLWATER, Okla. (AP)--Andrea Riley scored 43 points and led the way on an overpowering second-half surge by No. 23 Oklahoma State as the Cowgirls snapped No. 5 Baylor's 13-game winning streak with a 78-65 victory Saturday in the Big 12 opener for both teams.
Riley spoiled the conference debut of freshman sensation Brittney Griner with her second 40-point outing this season, closing the door by outscoring the Bears 10-2 over one stretch in the final 5 minutes.
The Cowgirls (13-2, 1-0 Big 12) returned to the Top 25 this week for the first time and proved they belong by knocking off the Bears for the second time in three years at Gallagher-Iba Arena.
Riley contributed 13 points, including a three-point play and two 3-pointers, during a 24-4 surge by OSU to start the second half as Baylor (13-2, 0-1) hit just one basket in the first 8 minutes after halftime.
Tegan Cunningham's two free throws pushed the lead to 60-42 with 11:44 remaining before the Bears finally broke through and responded with seven points in a row. Baylor could never get closer than 11 despite holding OSU without a basket for more than 6 minutes.
Griner finished with 16 points and 10 rebounds, but also a team-high five of Baylor's 17 turnovers. Shanay Washington and Ashley Field had 10 points apiece.
Cunningham added 14 points for Oklahoma State, which attempted a school record 37 3-pointers and continued taking care of the ball by committing only six turnovers.
Oklahoma State was content to fire from long range early on instead of challenging Griner, who blocks more shots per game (6.3) than all but eight teams in the country. The Cowgirls took 17 of their first 22 shots from 3-point range and connected on six before a brief drought allowed Baylor to reel off 10 straight points for a 36-26 lead.
But Griner got her second foul going for a rebound with 2:18 left before halftime, and Oklahoma State rallied back within 38-36 on Riley's buzzer-beating jumper from the left side.
Combined with the big run in the second half, Oklahoma State outscored Baylor 34-6 over a span of just under 12 minutes.