Nigel Johnson had a career-high 20 points, while Nino Williams finished with 15 points, including the game-clinching shot for Kansas State. Thomas Gipson added 12 points to help the Wildcats overcome an 8-point second half deficit.
The win marks just the 5th victory for Kansas State in their past 54 meetings against the Jayhawks. The Wildcats had lost 7 of their previous 8 games overall, and looks as if their streak of 8 straight 20-win seasons will come to an end.
Johnson had played just 10 minutes total in the last 2 games, but hit a shot that sealed the upset with just under a minute remaining. Kansas State was averaging just 52 points in the past 3 games.
Perry Ellis led the Jayahawks with 24 points, as their lead over Iowa State in the Big 12 is down to just a half game. Kelly Oubre Jr. added 14 points in the loss. Kansas trailed for most of the second half, falling at Bramlage Coliseum for the 4th time in 27 games.
Frank Mason III had just 4 points on 1-of-8 shooting for the Jayhawks. Kansas fell to 8-6 away from home, including 5-5 in true road games, despite outrebounding the Wildcats 37-28.
Kansas now sits at 22-6 overall, 11-4 in conference play, and will host Texas on Saturday. Kansas State improved to 14-15 on the season, 7-9 in the Big 12, and will host 12th-ranked Iowa State on Saturday.