The Bengals are 4-0 for the first time in 10 years and for the fourth time in franchise history following Sunday's 36-21 win over the visiting Kansas City Chiefs at Paul Brown Stadium.
The Cincinnati defense was tough in the red zone by keeping Kansas City out of the end zone and forcing a team-record seven field goals by Chiefs kicker Cairo Santos.
Fellow tackle Geno Atkins, and ends Carlos Dunlap and Michael Johnson added one sack each as every starting Cincinnati lineman got a piece of the action on Chiefs quarterback Alex Smith, who was sacked five times.
On offense, quarterback Andy Dalton added to his propensity for big games and big plays, including throwing a 55-yard touchdown pass on the run.
The Bengals had no turnovers. The Chiefs had one, a lost fumble by tight end Travis Kelce, who was limited to 49 yards on five catches.
The teams combined for 906 total yards, 461 for the Chiefs and 445 for the Bengals. Kansas City held the first-down advantage, 24-18. The Chiefs ran 73 plays to the Bengals 50, but found the red zone to be a dead end against the persistent Bengals defense.
The Bengals were bigger big-play artists, average 8.9 yards per play compared with 6.3 for the Chiefs.
Running back Jeremy Hill scored three touchdowns for the winners. Backfield mate Giovani Bernard scored one, and led the Bengals with 62 rushing yards on 13 carries. Hill rushed nine times for 40 yards.
The Bengals matched the third-best start in team history, two wins shy of the club record 6-0. They have trailed for all but 1:58 of the season.
The Chiefs didn't allow 30 points in a game all last year.
Dalton has been a constant throughout the Bengals' season-opening streak while moving to the top of the AFC passer list. He had another outstanding day, finishing 17-of-24 passing for 321 yards with a long touchdown pass to Brandon Tate following a scramble.
It was another tough day for the Chiefs (1-3), as the Kansas City defense couldn't keep up with Dalton and the gang.
Smith threw for 386 yards, 148 of those on 11 catches going to receiver Jeremy Maclin.
Chiefs tailback Jamaal Charles was held in check on the ground, with 11 carries, while the Chiefs stayed in rally mode, though he did rush for 75 yards while averaging a whopping 6.8 yards per carry. He caught six passes for 70 yards.
Kevin Huber averaged 47.7 yards per punt for the Bengals, who stretched their AFC North Division lead over Pittsburgh to two games.
Up next for Cincinnati is defending NFC champion Seattle at home next Sunday.