PITTSBURGH -- The Pittsburgh Steelers ran their winning streak to four games Monday night, but it wasn't pretty, and it might have been costly.
The Steelers edged the hapless Kansas City Chiefs 16-13 when Shaun Suisham kicked a 23-yard field goal with 14:05 left in overtime at Heinz Field.
Steelers quarterback Ben Roethlisberger wasn't part of the winning finish. He hurt his right shoulder in the opening minute of the third quarter when he was sacked by Justin Houston.
Roethlisberger did not return to the game, and when he left the Steelers' locker room to have X-rays, televisions cameras showed that his shoulder was in a sling.
Steelers linebacker LaMarr Woodley intercepted a Matt Cassel pass on the second play of overtime and returned it 23 yards to the Kansas City 5. Pittsburgh wasted no time bringing in Suisham for the game-winning kick.
Kansas City's Ryan Succop kicked a 46-yard field goal as time expired in regulation to tie the game at 13-13 and force overtime. The Chiefs drove eight plays and 52 yards in 1:52 for the field goal.
Cassel, starting for a second straight week with Brady Quinn out due to a concussion, kept the Chiefs' hope alive when he completed a 27-yard pass to Dwayne Bowe to the Steelers' 28 on fourth-and-15. That gave Succop to opportunity to tie the game after he missed a 32-yard attempt wide right in the third quarter.
The score was 10-10 when Roethlisberger got hurt. Suisham kicked a 31-yard field goal with 12:41 remaining to put Pittsburgh (6-3) in front.
The Chiefs (1-8) lost their sixth consecutive game.
Roethlisberger completed nine of 18 passes for 84 yards and a touchdown. Backup Byron Leftwich went 7-for-14 for 73 yards.
It was Leftwich's first action since the final game of the 2010 regular season, when he mopped up in a 41-9 rout of the Cleveland Browns. He missed all of last season after suffering a broken elbow in the preseason.
Leftwich has not started since 2009, when he went 0-3 in place of Roethlisberger.
Kansas City's Jamaal Charles rushed for 100 yards and one touchdown on 23 carries on a rainy night. Cassel completed 11 of 26 passes for 154 yards with one interception.
Pittsburgh overcame a 10-0 deficit to forge a 10-10 halftime tie. Mike Wallace made a tumbling, one-handed catch in the end zone of Roethlisberger's 7-yard pass with 3:16 left in the second quarter to even the score.
For the first time all season, Kansas City took a lead in regulation as it built a 10-0 advantage.
Charles opened the scoring when ran 12 yards for a touchdown with 8:42 left in the first quarter. The run capped a four-play, 70-yard drive that was highlighted by Matt Cassel's 38-yard pass to Tony Moeaki.
The Chiefs pushed the lead to 10-0 on Succop's 22-yard field goal that came 40 seconds into the second quarter. The kick came three plays after Allen Bailey recovered a fumble by Steelers running back Isaac Redman at the Pittsburgh 11-yard line.
The Steelers cut the deficit to 10-3 on Suisham's 35-yard field goal with 5:38 left in the half.
The last NFL team to play first eight games of the season without a lead was the 1929 Buffalo Bisons. The only time the Chiefs had been ahead this year before Monday was when Succop kicked a field goal in overtime to beat the New Orleans Saints 27-24 on Sept. 23.
NOTES: Kansas City placed defensive end Glenn Dorsey on injured reserve before the game with a calf injury and added cornerback Neiko Thorpe to the active roster from the practice squad. Dorsey, the fifth overall selection in the 2008 draft, played in just four games this season and was in on seven tackles. ... The Chiefs made wide receiver Steve Breaston a healthy scratch. Despite playing in each of the first eight games, Breaston has just six catches for 61 yards. ... Pittsburgh released nose tackle Alameda Ta'amu, its fourth-round draft choice this year, before the game to clear a spot on the roster for wide receiver David Gilreath, who was activated from the practice squad. Ta'amu returned to the Steelers on Oct. 30 following a two-game suspension imposed by the team. He was arrested on Oct. 14 after allegedly leading police on a drunken chase by vehicle and on foot through the streets of Pittsburgh. Ta'amu was charged with felony fleeing police, aggravated assault and aggravated assault by vehicle. ... Steelers wide receiver Antonio Brown missed a game for the first time in his three-year career because of a sprained ankle. He was one of four inactive Pittsburgh starters, along with running back Rashard Mendenhall (Achilles), safety Troy Polamalu (calf) and offensive tackle Marcus Gilbert (ankle).