A tough defense and kicker Shaun Suisham led the Pittsburgh Steelers to a 16-13 overtime win against the Kansas City Chiefs on Monday Night Football.

The Steelers, who won their fourth straight game, are now 6-3 and in second place in the American Football Conference North Division.

The win, however, was costly for Pittsburgh, which lost quarterback Ben Roethlisberger to a shoulder injury at the start of the 3rd quarter.

Suisham kicked a 23-yard field goal 51 seconds into OT after linebacker Lawrence Timmons intercepted a pass thrown by Chiefs quarterback Matt Cassell and took the ball to the Kansas City five.

The Steelers won the game but are unsure of the extent of Roethlisberger's injury.

Roethlisberger had completed nine of 18 passes for 84 yards, with a touchdown and no interceptions, before being knocked out of the game.

Roethlisberger fell to the ground awkwardly after being hit by Chiefs linebackers Tamba Hali and Justin Houston.

He landed on his right shoulder and was treated by team trainers, who helped him get off the field.

Cassel was 11 of 26 for 154 yards, with no touchdowns and the interception that cost his team the game.

K.C. running back Jamaal Charles gained 100 yards on 23 carries and scored the only touchdown for the Chiefs, who lost their sixth straight game and fell to 1-8. EFE