Michael Flowers poured in 27 points, Mouhamed Gueye scored eight of his 19 in overtime and Washington State handed Oregon State its 15th straight loss 103-97 on Monday night. Flowers sank 10 of 18 shots from the floor, including 6 of 10 from 3-point range, for the Cougars (16-13, 9-9 Pac-12 Conference), who trailed 48-37 at halftime.