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Kansas City, Mo. • Mike McCarthy never put a whole lot of stock in a perfect season, except as a means of gaining home-field advantage and setting the Green Bay Packers up for another Super Bowl run.

Well, they still have a chance to earn home-field advantage.

The perfect season? That's history.

Kyle Orton threw for 299 yards to outduel Aaron Rodgers, and the Kansas City Chiefs rallied behind interim coach Romeo Crennel for a shocking 19-14 victory on Sunday that ended the Packers' 19-game winning streak. It was their first loss since Dec. 19, 2010, at New England.

"I personally always viewed the undefeated season as, really, just gravy," McCarthy said. "The goal was to get home-field advantage and win the Super Bowl. That's what we discussed."

Aaron Rodgers was 17-for-35 for 235 yards and a touchdown, and he also scampered 8 yards for another touchdown with 2:12 left in the game. But the Packers were unable to recover the onside kick, and Kansas City picked up a couple of first downs to secure the victory.

Ryan Succop kicked four field goals for Kansas City (6-8), which had lost five of its last six games and fired coach Todd Haley last Monday. Jackie Battle added a short touchdown plunge with 4:53 left in the game, points that came in handy when Rodgers led one last scoring drive.

"Everybody had marked it off as a win for the Packers, but those guys in the locker room, they're football players," Crennel said. "They decided they were not going to lay down, they were not going to give up, so they went out and played a tremendous game."