Leonard Washington scored 22 points and Larry Nance Jr. added 14 as Wyoming used a stingy defense to beat No. 19 Colorado 76-69 Saturday night.
Luke Martinez added 13 points, while Josh Adams and Derrious Gilmore each scored 12 as Wyoming (8-0) beat a ranked opponent at home for the eighth time in 13 games since the 1995-96 season.
Spencer Dinwiddie scored 24 points and Andre Roberson had 16 points and 12 rebounds for Colorado (6-1), which was off to its best start since 1989-90.
However, the Cowboys' aggressive, swarming defense held the Buffaloes below their 76-point scoring average coming into the game.