Sometimes, field goals are enough.

Pittsburgh Steelers kicker Chris Boswell made an NFL postseason record six of them, as the Steelers defeated the Kansas City Chiefs, 18-16, ending their season at Arrowhead Stadium.

The Chiefs attempted a comeback on a Spencer Ware touchdown run, but a penalty and a failed two-point conversion proved to be the difference.

Pittsburgh won the toss and received to start the game, and its offense came out looking very strong.

Quarterback Ben Roethlisberger found three different receivers for five completions and 41 yards, and running back Le'Veon Bell had three rushes for 25 yards. The Pittsburgh offense got as far as third-and-2 at the Kansas City 5-yard line, but safety Ron Parker was quick to tackle Steelers wide receiver Eli Rogers on a short pass to Roethlisberger's left, and the Chiefs forced fourth down.

Pittsburgh originally kept the offense on the field, forcing the Chiefs to call timeout, and then Boswell came on for the 22-yard field goal and 3-0 Steelers lead.

The Steelers refused to kick it deep to Chiefs returner Tyreek Hill, so tight end Demetrius Harris caught the short kickoff and returned it 25 yards to the Kansas City 45-yard line. Alex Smith and the offense went to work with the short field position.

Ware and Hill picked up 7 yards on back-to-back plays, then Smith hit TE Travis Kelce for a 21-yard gain.

Smith hit Hill, then WR Jeremy Maclin to get the Chiefs to first-and-goal at the Pittsburgh 5-yard line, and on first down, Smith found WR Albert Wilson short to his left for the 5-yard touchdown, giving the Chiefs a 7-3 lead.

The Steelers got to third-and-10 at their own 25-yard line on the ensuing possession, and just as linebacker Tamba Hali was about to get to Roethlisberger, he launched the ball to WR Antonio Brown for a 52-yard gain to the Kansas City 20. Despite the new set of downs in the Kansas City red zone, the Steelers settled for a 38-yard field goal, making it 7-6 with less than four minutes remaining in the first quarter.

The Chiefs punted on the ensuing possession.

As the quarter turned, the Steelers drove. In a 14-play drive, Bell rushed seven times for 31 yards, but on his final rush of the drive on second-and-10 at the Kansas City 17-yard line, safety Eric Berry stopped him in his tracks for a loss of 1 yard.

On third-and-11, a pass attempt to Bell was incomplete, and the Steelers settled for a 36-yard field goal, retaking the lead, 9-7.

The Chiefs had first-and-10 at the Kansas City 35-yard line on their next possession, and on a play-action pass play, Smith was hit as he threw, and linebacker Ryan Shazier picked the ball off.

Pittsburgh took over at the Kansas City 44-yard line. Roethlisberger handed it off to Bell on the first two plays of the drive for 9 and 4 yards, respectively, and then he threw it to TE Jesse James for a 26-yard gain.

On first-and-goal at the Kansas City 5, Roethlisberger had a ball tipped by LB Frank Zombo at the line, and Berry picked it off in the end zone for a touchback.

The Chiefs went three-and-out on the possession.

After a punt, Pittsburgh started at their own 45-yard line, and following two stops and a delay-of-game penalty, the Steelers had third-and-9.

On third down, Roethlisberger handed it off to Bell, who rushed it to the right end for a 17-yard gain and first down. After back-to-back rushes of 6 yards apiece, the Steelers got another first down at the Kansas City 37-yard line, but the Chiefs forced a 45-yard field goal attempt, which Boswell came on to make.

The Steelers led, 12-7, at the half.

The Chiefs quickly went three-and-out to start the third quarter, and the Steelers added a 48-yard field goal on their next possession to make it 15-7.

The Chiefs drove as far as the Pittsburgh 39 on their next possession, but after a delay-of-game penalty, Steelers LB James Harrison sacked Smith on a third-and-7 for a loss of 5 yards.

Dustin Colquitt came on to punt and pinned the Steelers back to their own 2-yard line.

The Chiefs forced the first Steelers punt of the game with 3:08 left in the third quarter, and Pittsburgh punted it out of bounds to avoid Hill. The Chiefs started at the 46-yard line.

On second-and-10 at the Pittsburgh 46, Smith scrambled for 5 yards to make it third-and-5, but Kelce took an unnecessary roughness personal foul after the play, and it was all of a sudden third-and-20.

After a timeout, Smith found Maclin 20 yards down the right sideline, and Maclin managed to get two feet in bounds for the first down. The drive led to a 48-yarder by Cairo Santos, and the Chiefs trailed, 15-10, heading into the fourth quarter.

Starting on the Steelers 30-yard line, Roethlisberger drove the Steelers down to the Chiefs 19 in eight plays, but a stop on second-and-8 at the 19 and the first sack of the game on third down led to another Boswell field goal.

The 43-yarder broke the NFL record and gave the Steelers an 18-10 lead.

The Chiefs faced fourth-and-8 at the Pittsburgh 38, and Andy Reid opted to go for it. WR Chris Conley ran a slant and made a diving catch for a 12-yard gain and first down. Pittsburgh would force a third-and-9 at the Pittsburgh 25, but a helmet-to-helmet personal foul call on Sean Davis gave the Chiefs a new set of first downs.

The Steelers forced another fourth down with 2 yards to go at the Pittsburgh 4, and Reid opted to go for it again.

Smith faked a Hill handoff, and then found Anthony Sherman for 3 yards and a first down. Ware ran it in 1 yard on the next play for a touchdown.

Reid sent the offense back on the field for a two-point conversion try, and the Chiefs appeared to convert with a Smith pass to Harris. The play was called back with a holding penalty.

The Chiefs could not convert the next attempt from the 12-yard line, and they kicked it away to the Steelers, pinning them at their own 5-yard line.

The Steelers took over with 2:38 left, and the Chiefs had one timeout.

Bell ran it for 2 yards on first down, and the Chiefs used their last timeout. On second down, Roethlisberger threw it to Rogers for a gain of 5 yards, bringing the clock down to the two-minute warning.

On third-and-3, Roethlisberger hit Brown short to his right for 7 yards.

Without any timeouts, the Steelers ran out the clock on the Chiefs' season.

LB Ramik Wilson led the Chiefs with 15 tackles (eight solo). Defensive end Jarvis Jenkins and LB Dee Ford split a sack.

Bell finished with 30 carries for 170 yards. Brown had six catches for 108 yards. Kelce led the Chiefs with five receptions for 77 yards.