KANSAS CITY, Mo. -- The lowly Kansas City Chiefs pulled a stunner today when they upset the Steelers in overtime 27-24, putting a serious dent in the Super Bowl champions' chances of repeating.

Moments after Steelers cornerback Ike Taylor dropped what would have been an interception at his 23 in overtime, Matt Cassel completed a medium-range pass to Chris Chambers, who skipped past a tackle by Ryan Clark to the four for a 61-yard gain.

Rookie kicker Ryan Succop then came on and kicked a 22-yard field goal for the victory with 8:28 left in the extra period.

The Chiefs, 10 point underdogs, scored 10 points in the fourth quarter to tie it.

The Steelers' second consecutive loss dropped them to 6-4. The Chiefs are 3-7.

Quarterback Ben Roethlisberger left the game with 12:42 left in overtime after he was hit in the head by the knee of Chiefs' Derrick Johnson after he scrambled away from pressure.

Charlie Batch came on and completed a 17-yard pass to Santonio Holmes on his first play to KC's 43. However, that first drive of overtime bogged down there and the Steelers punted.

The Chiefs took over at their 20 to start the winning drive.

The Kansas City Chiefs scored a touchdown with 4:54 left in the fourth quarter to send today's game against the Steelers into overtime.

After getting burned by two Ben Roethlisberger interceptions that were turned into 10 points, the Steelers used a turnover of their own to retake the lead at 24-17 with 8:35 left in the game.

On third down from his 37, KC quarterback Matt Cassel fumbled as he was sacked by linebacker Lawrence Timmons. James Harrison recovered at the Chiefs' 27.

Roethlisberger turned that into his third touchdown pass, an 8-yard strike over the middle to halfback Rashard Mendenhall.

But the Chiefs shocked the Steelers' second-ranked defense by driving 91 yards to tie the score at 24-24 with 4:54 left. Cassel completed consecutive passes of 30 yards to Lance Long and 47 yards to Chris Chambers, and threw a 2-yard TD pass to Jamaal Charles.

Two interceptions by the Kansas City Chiefs in the third quarter brought them back to life and helped forge a tie with the Steelers at 17-17 after three quarters of today's game.

Heath Miller, having a big game with three catches for 67 yards and a touchdown in the first half, dropped a pass from Ben Roethlisberger that then popped into the air and was intercepted by Kansas City linebacker Andy Studebaker in the third quarter.

The Chiefs took over at their 38 and drove 62 yards for a touchdown that closed the Steelers' lead to 17-14. Tight end Leonard Pope caught a 21-yard pass from Matt Cassel for the Kansas City score.

Late in the quarter, with the Steelers poised at the Chiefs 10 and a first down, Roethlisberger was hit as he threw and the ball fluttered into the hands of Studebaker again in the end zone. The young linebacker, starting his first NFL game because Mike Vrabel is injured, returned the ball 94 yards to the Steelers' 8.

Ryan Succop kicked a 27 yard field goal with five seconds left in the quarter to tie the game 17-17.

The Steelers scored all of their points in the second quarter after another kickoff return for a touchdown against them to take a 17-7 halftime lead.

Jeff Reed kicked a 36-yard field goal and Ben Roethlisberger threw touchdown passes of 8 yards to Hines Ward and 10 yards to Heath Miller.

Kansas City's Jamaal Charles returned the game's opening kickoff 97 yards for a touchdown, the fourth such return against the Steelers in the past five games.

In the first quarter, Kansas City's Jamaal Charles returned the opening kickoff 97 yards for a touchdown, the fourth such return against the Steelers in the past five games.

Those four kickoff returns for touchdowns allowed set a Steelers record.

That score held up as the teams entered the second quarter with Kansas City ahead 7-0.

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