The Packers made it to 13-0. But not 14-0.
The Chiefs pulled off the surprising upset - no undefeated teams in 2011.
It's the Packers' first loss in 364 days.
The 1972 Dolphins will celebrate tonight.
On the other side, the Colts won their first game.
The 2008 Detroit Lions won't be getting any company among the 0-16 ranks.