He threw three interceptions, didn't complete a deep pass and, ultimately, was bailed out by his defense.
"You have to keep playing," said Manning, who improved to 4-6 in the playoffs. "Every time you drop back to throw, your goal is to possess the ball on the next play. Three times, I was very poor on that. As soon as it gets you second-guessing, as soon as it gets you gun-shy, that's when you have problems."
The beleaguered Indianapolis defense was so good -- or perhaps more accurately, Kansas City's offense was so bad -- that Manning's miscues didn't stop the AFC South champions from advancing to the next round at Baltimore on Jan. 14.
"Our defense was awesome today," Manning said. "We made some mistakes and the defense made sure we didn't pay for it."
"We heard it all about having the worst defense," Freeney said. "Now we can here this: We have the best run defense in the playoffs."
That was most evident after Kansas City finally woke up and drove 60 yards for a 6-yard touchdown catch by Tony Gonzalez with eight seconds remaining in the third period. Then the Colts went 71 yards on nine plays, mostly victimizing the Chiefs' linebackers underneath. Reggie Wayne caught a 5-yard TD pass to make it 23-8.
When Bob Sanders intercepted Green's desperate lob with just more than six minutes remaining, the Colts could start making travel plans for Baltimore -- the city they left 23 years ago.
"It's a big challenge," Manning said. "Playing Baltimore is tough enough, but to go there -- I think it's one of the tougher places to play. And they've been off a week and are fresh."
Until falling behind 16-0, the Chiefs looked like a team surprised to have made the playoffs, which they did with a lot of help from other clubs. Johnson, who rushed for 1,789 yards and 17 TDs this season, was never a factor. He had only 32 yards on 13 carries.
"If we can't do what we do best, it amps them up," Johnson said. "And they certainly got amped up."
And while Manning's favorite receiver, Marvin Harrison, also had little impact, tight end Dallas Clark, in just his second game back from a knee injury, had nine catches for 103 yards.
"The way Kansas City's defense was, there were very few times we'd get a true single coverage outside on Marvin and Reggie," Manning said. "Play action to get the ball downfield was not there. But our running backs did such a great job of getting open and catching the ball and what we call 'going north.'
"Those checkdowns turned into 12-yard gains, and that's a real positive for the offense."
This game took a far different shape than the previous meeting between these clubs.
When Dustin Colquitt punted less than 1½ minutes into the game, it was one more punt than in a 38-31 Indianapolis win three years ago at Kansas City. His 37-yard effort gave the Colts good field position, and they wound up with Vinatieri's 48-yard field goal.
Vinatieri added a 19-yarder to make it 6-0 following a 42-yard hookup on third down between Manning and Harrison on another short pass.
Combined with four dropped passes, no first downs -- that's right, none -- and 16 total yards, it made for a futile first half for the Chiefs, who haven't won a postseason game in 13 years.
"We didn't get any rhythm offensively," Chiefs coach Herman Edwards said. "I thought our defense hung in there for the most part, but I think they got a little fatigued."
Law got his ninth career pick of Manning early in the third quarter, but KC went three-and-out again. Edwards, one of Colts coach Tony Dungy's best friends and a former assistant under Dungy, looked perplexed. That look never faded.
Notes: Law has four more interceptions of Manning than anyone else. ... Dominic Rhodes added 68 yards rushing for the Colts. ... Vinatieri's 50-yard FG tied the club record by Mike Vanderjagt in 2000 ... Previously, the fewest net yards allowed in a playoff game by the Colts was 139 against Cincinnati in 1970, and the fewest yards rushing was when Cleveland had 56 in 1968. ... Chiefs WR Eddie Kennison, who had 53 receptions this season, was shut out.