The Colts, who had 20 sacks in the previous five games, didn’t sack Roethlisberger once — and hardly hit him at all — as the quarterback continually carved up a defense that lost cornerback Vontae Davis early to a right knee injury.
“Big Ben” had four TD passes in the first half. Wide receiver Antonio Brown caught two of them as the Steelers enjoyed a 35-20 lead at intermission.
Roethlisberger completed 40-of-49 passes to celebrate his 100th career victory in style. His 11-yard scoring pass to tight end Heath Miller on a fourth-and-1 gamble put the game away with 5:14 remaining. The Steelers passer broke his own single-game team record of 503 passing yards.
The 51 points scored were the most by the Steelers (5-3) this season and most allowed by the Colts (5-3).
Luck tried to bring his team back with three scoring passes, but he also gave up some points, too. William Gay intercepted an ill-advised Luck sideline pass and scored for a 21-3 Steelers lead early in the second quarter. Luck was also called for intentional grounding while in the end zone for a Steelers safety in the final quarter. He was intercepted a second time in the end zone to kill a late scoring opportunity.
While the Colts rarely reached Roethlisberger, the Steelers pounded Luck throughout. He was sacked three times and absorbed repeated punishment, including after he unloaded a second-quarter touchdown pass to T.Y. Hilton. The Colts’ No. 1 pass catcher had six receptions for 155 yards.
Brown finished with 10 catches for 133 yards. Steelers rookie wide receiver Martavis Bryant also had two TD catches among his five receptions for 83 yards.
Luck completed 26-of-45 passes for 400 yards. The Colts’ third-year quarterback, who leads the NFL in passing yards, has had six consecutive games with 300-plus yards.
Davis, who might be playing the best of the Colts defenders, got hurt while trying to make a tackle on a running play in the first quarter and did not return. Outside linebacker Erik Walden exited with a hip injury after the first half.
Colts running back Ahmad Bradshaw scored his team-leading eighth touchdown on a third-quarter rush. Rookie wide receiver Donte Moncrief caught seven passes for 113 yards with one TD. Tight end Dwayne Allen scored the Colts’ first TD on a 21-yard reception in the second quarter.
The Steelers won their second consecutive game for the first time this season. The Colts had not lost since Week 2 at home against Philadelphia.
The Colts will play their second consecutive road game next Monday night at the New York Giants before getting a bye.
Phillip B. Wilson can be found on Twitter (@pwilson24), Facebook and Google+.