(Associated Press) NORMAN, Okla. -- Nyeshia Stevenson scored 21 of her 22 points during an eight-minute stretch as No. 13 Oklahoma opened a wide gap early in the second half and beat Kansas 81-69 Saturday to give Sherri Coale her 300th victory.Stevenson went 7-for-10 during her scoring spree that started with a layup with 5 minutes, 33 seconds left in the first half and continued into the second.