The Chiefs used four field goals by kicker Ryan Succop and a stifling defense that limited the potent Green Bay offense to turn the trick and knock the Packers (now 13-1) from their undefeated status.
The Colts (now 1-13) put away the Tennessee Titans behind an 80-yard touchdown run by Donald Brown (16 carries for 161 yards) that earned them their first win of the season. The loss all but eliminated the Titans from playoff contention in the AFC.
In addition to those stunners, the New York Giants blew a golden opportunity to stay in first place in the NFC East as they lost at home to the Washington Redskins, 23-10.
Meanwhile, the Houston Texans, battling three other teams for the top spot in the AFC playoff picture, lost at home, 28-13 against the Carolina Panthers.
More details on all the games around the NFL for Week 15 will be posted on Monday.