Four weeks into the regular season, the Ravens surprisingly have the NFL's second-ranked offense, trailing only the New England Patriots. Baltimore hasn't finished a season ranked in the top 10 in offense since 1997, when Vinny Testaverde was the quarterback. Last season, the Ravens' offense was 15th in the league, averaging 338.7 yards per game. After four games in 2012, Joe Flacco and the Ravens are averaging 424 yards of offense.

The defenses continue to be the biggest disappointment for the division. A year after all four finished in the top 10, three defenses rank in the bottom half of the NFL.

A look at how the AFC North ranks in the NFL's major statistical categories:

CINCINNATI BENGALS

OFFENSE: Overall (10th), run (13th), pass (8th) and scoring (8th).

DEFENSE: Overall (19th), run (24th), pass (16h) and scoring (25th).

CLEVELAND BROWNS

OFFENSE: Overall (25th), run (27th), pass (20th) and scoring (27th).

DEFENSE: Overall (25th), run (19th), pass (28th) and scoring (20th).

BALTIMORE RAVENS

OFFENSE: Overall (2nd), run (12th), pass (4th) and scoring (5th).

DEFENSE: Overall (23rd), run (13th), pass (29th) and scoring (10th-tied).

PITTSBURGH STEELERS

OFFENSE: Overall (18th), run (31st), pass (7th) and scoring (13th).

DEFENSE: Overall (5th), run (14th-tied), pass (3rd) and scoring (21st).