No. 6 BYU's undefeated season ends with a 17-13 loss to Kansas, marking their first defeat. The Cougars' second-half struggles and a fluky punt return led to the Jayhawks' go-ahead touchdown. BYU now trails Colorado by a game in the Big 12 standings.

Source: https://sports.yahoo.com/no-6-byus-undefeated-season-ends-with-17-13-loss-to-kansas-063215935.html