The final bad moment in another bad Indianapolis start.
"It wasn't enough," said Luck, who was 29 of 46 for 326 yards without an interception or a sack. "The Bengals beat our butts fair and square, and there's no way to mince those words. The slow start hurt us."
Dalton regained his passing touch in time to keep the Bengals perfect at home and in control of the AFC North. He threw for three touchdowns and ran for another, making a 21-0 lead stand up.
Despite the loss, the Colts were in position to clinch the AFC South later Sunday if Tennessee lost at Denver.
"We've got some things to clean up, but we certainly came down here with the mindset that we wanted to win this football game and certainly win the division that way," coach Chuck Pagano said.
The Bengals (9-4) kept their firm grip on first place, two games ahead of Baltimore with three to play.
It had been a while since Dalton was this good. He was the AFC's offensive player for October, but hadn't put together a consistent game since.
He was as good as ever on Sunday, helping the Bengals improve to 6-0 at Paul Brown Stadium on a cold, windy day - 28 degrees at kickoff with a wind chill of 19.
They're in position to clinch their first AFC North title since 2009 with two home games in the last three weeks.
"I hit his foot when he came through," said Chapman, who started celebrating his play.
Green-Ellis said he felt someone trip him. He stumbled ahead, avoided a couple of defenders, landed at the 1-yard line and slid into the end zone. He was initially ruled down, but the Bengals were awarded a touchdown after a review.
The review focused only on whether a defender touched Green-Ellis as he fell near the goal line, not whether Chapman had tripped him in the backfield, referee Jeff Triplette said.
"We looked at the goal line, (those) were the shots that we looked at," Triplette said.
Notes: The Bengals moved 2012 Pro Bowl tackle Andrew Whitworth to left guard, and right guard Kevin Zeitler was out of the lineup for the third straight game because of injury. The Colts were missing guards Hugh Thornton and Jeff Linkenbach. ... Colts RB Chris Rainey will get an MRI on an injured ankle. ... The Bengals have scored 49, 41 and 42 points in their past three home games, the first time they've scored at least 40 in three straight at home. ... RB Giovani Bernard had 99 yards on 12 carries, coming up a yard short of the first 100-yard rushing game by a Bengal this season. He also had 49 yards on four catches.
Copyright 2013 by The Associated Press