Thompson leads Washington State to 83-57 victory
Thompson was 10 of 20 from the field, and Faisal Aden came off the bench to score 20 points for the Cougars (9-1), who won their fourth straight.
The Bulldogs (7-4) held a 40-39 lead at halftime, but Washington State used a 14-0 run early in the second half to take a 57-45 lead and pull away for good.
Kodi Augustus led Mississippi State with 19 points, and Brian Bryant had 14. Leading scorer Ravern Johnson, who was averaging 22.4 points, was held to three on 1-of-10 shooting.
Washington State shot 50 percent from the field, while Mississippi State shot 34.5 percent and committed 21 turnovers.