It was Pittsburgh's most lopsided defeat since a 37-7 whipping by Dallas in the 1997 season opener.
"A very pitiful performance out there today," Steelers coach Bill Cowher said. "Where we go from here is we've got to line up and play this thing out. It starts next week."
Baltimore (9-2) leads Pittsburgh (4-7) in the AFC North by five games with five to play.
The nine sacks, which totaled 73 yards and matched a Ravens franchise record, included a vicious hit by Bart Scott that forced Roethlisberger out of the game in the second quarter. The quarterback missed only one play, but for the rest of the afternoon he was harassed by a relentless rush.
"They got after it. You can't get mad at the line; they did a good job," Roethlisberger said. "There were so many things they had to pick up."
After a while, the only thing Roethlisberger could do was duck.
"We do what we always do. We just did a little bit more of it," said Baltimore linebacker Terrell Suggs, who had six tackles and two sacks. "It came from different places that we don't usually do."
It was the second time this year that the Steelers were shut out; the last time Pittsburgh was blanked at least twice in a season was in 1989.
"You got a rivalry game and they don't score, you not only send a message for the next time you play them, you send a message to the next team you play," Suggs said.
Roethlisberger went 21 for 41 for 214 yards and two interceptions. Willie Parker got only 15 yards rushing in the first half and finished with 22.
Baltimore led 17-0 at halftime after limiting Pittsburgh to three first downs. Steve McNair spent most of the second half handing off the ball after going 13 for 17 for 121 yards and a touchdown in the opening 30 minutes.
McNair was 18 for 24 for 140 yards before being replaced by Kyle Boller with just over 10 minutes to play.
Jamal Lewis ran for 66 yards and a touchdown, and Todd Heap had seven catches for 58 yards and a score.
Baltimore is 5-0 since Billick fired offensive coordinator Jim Fassel and began calling the plays himself. The offense was impressive, but the key to the blowout was a defense that welcomed back middle linebacker Ray Lewis, who missed the previous two games with a back injury.
Lewis was credited with six tackles, including a sack.
"It's just great to have 52 back," defensive coordinator Rex Ryan said. "He just energized the whole team."
The Ravens set the tone on their opening drive, moving 56 yards in six plays for a 7-0 lead. McNair went 4 for 4 for 51 yards, including a 20-yard touchdown pass to a wide-open Heap.
While the Steelers struggled offensively, Baltimore gained favorable field position through a series of punts and began its fourth drive on the Pittsburgh 47. Eight plays later, Jamal Lewis pounded in from the 1 to make it 14-0.
Later in the second quarter, Scott zipped around left end untouched and flattened Roethlisberger with a driving hit to the chest. The quarterback lay prone for several minutes before finally walking off the field on his own.
"That's probably the hardest I've ever been hit in my life. I didn't see the guy coming," Roethlisberger said. "He hit me clean, hit me front side and I just kind of remember my head hitting the ground.'
Charlie Batch entered for one play, a 10-yard completion to Parker on a third-and-16.