Bryce Thompson and Marchelus Avery each scored 15 points to lead Oklahoma State to an 83-73 win over Colorado in Big 12 play on Saturday in Stillwater, Okla.Thompson made 4 of 10 attempts from the field, including 2 of 5 attempts from 3-point range. Avery also made 4 of 10 shots and missed his lone 3-point attempt in 24 minutes off the benchAbou Ousmane chipped in 14 points for Oklahoma State on 5-of-8 shooting. Pat Suemnick added 10 points for Oklahoma State off the bench, all coming in the first half.Oklahoma State (10-7, 2-4 Big 12 ) prevented a third straight loss in Big 12 play with the win. Colorado (9-8, 0-6) remains winless in conference play to start the season, with five of the six losses coming by 10 points or less.Colorado pulled within four points early in the second half but that was as close as it would get. Oklahoma State responded by making five of its next six shots, pushing the lead back to double digits on aConnor Dow 3-pointer with 12:38 remaining. The Cowboys led by as many as 18 points in the second half.