PITTSBURGH (AP) - The Pittsburgh Steelers stood around as the Baltimore Ravens scored an inexplicable first-half touchdown. Then it was the error-prone Ravens who watched helplessly as the team they love to beat most came back to beat them when it mattered most.
Ben Roethlisberger hit rookie Antonio Brown on a 58-yard pass play on third-and-19, and Rashard Mendenhall scored from the 2 with 1:33 remaining to give the Steelers a 31-24 comeback victory over the Ravens in an AFC divisional playoff game Saturday.
The Steelers, 9-0 against division teams in the playoffs, advance to their fifth AFC championship game in 10 seasons next Sunday - at New England if the Patriots beat the Jets on Sunday, in Pittsburgh if the Jets win. They will be play to reach the Super Bowl for third time in six seasons.
"I saw the young fella just take off, so I'm just going to throw it up for you," Roethlisberger said of his throw to Brown, who wasn't even activated regularly until midseason.
The Steelers (13-4) were trailing 21-7 at halftime after turnovers created two Ravens touchdowns. But they came back with the help of three Baltimore turnovers in the third quarter. It was so bad, the Ravens' minus-4 yards in offense wasn't the worst of it.
Baltimore was outgained 263-126 as Joe Flacco was 16 of 30 for 125 yards as the Ravens became the eighth team in NFL playoff history to fail to gain at least 100 yards in the first three quarters. All eight teams lost.
The Ravens' last chance to beat the Steelers - they haven't in three postseason tries - ended when T.J. Houshmandzadeh dropped Flacco's fourth-down pass at the Steelers' 38 with 1:03 remaining.
Failing to protect the ball cost the Ravens - even after they scored two touchdowns in less than 30 seconds in the first half. Defensive end Cory Redding returned a Roethlisberger fumble for a touchdown that both teams thought was an incompletion, but that wasn't nearly enough on a day when the Ravens offense did so little.
"What better way to put the Ravens out of the tournament," Steelers wide receiver Hines Ward said. "They keep asking for us and we keep putting them out of the tournament. They're going to be ticked about this for a long time."
With Baltimore up 21-7, Ryan Clark forced a rare fumble by Ray Rice on a screen pass, and LaMarr Woodley recovered at the 23. The play re-energized the crowd of 64,879 that had grown silent as Baltimore opened its two-TD lead.
"You know what, our offense went in there (at halftime) and said, `We played terrible, we gave them the ball in prime position too many times,' " Roethlisberger said. "We had to do something about it."
Mendenhall ran for 14 yards before Roethlisberger's 9-yard scoring pass to Heath Miller, who missed two games after sustaining a concussion on a hit by Jameel McClain during the Steelers' 13-10 win in Baltimore last month.
Later in the quarter, Flacco overthrew tight end Todd Heap, and Clark returned the interception 17 yards to the 25. Three plays later, Roethlisberger found ol' reliable Ward, absent in the offense most of the day, for an 8-yard touchdown pass and it was tied at 21.
Along the sideline, the Ravens had the look of a team that couldn't believe it had squandered the lead - and couldn't figure out how to get it back. They never did.
Roethlisberger went 19 of 32 for 226 yards as he beat the Ravens for the seventh successive time in a rivalry in which both teams had won twice by 3-point margins during the last two seasons. The asterisk: Roethlisberger didn't play in either Steelers loss.
Baltimore turned it over for the third time in nine minutes as center Matt Birk snapped the ball early to Flacco, who never got his hands on it, and Pro Bowl defensive end Brett Keisel recovered at the 23.
The drive stalled, but Shaun Suisham, who had missed earlier, converted a 35-yard field goal with 12:15 remaining to give Pittsburgh its first lead since its opening drive at 24-21.
An apparent Lardarius Webb punt return touchdown was negated by a holding penalty on Marcus Smith, but the Ravens - with only 36 yards of offense in the half to that point - tied it at 24 on Billy Cundiff's 24-yard field goal with 3:54 remaining. That was too much time for Roethlisberger, who excels in fourth quarter comebacks.
The Steelers rallied despite losing both starting tackles, Flozell Adams (illness) and Jonathan Scott (leg), forcing even more patching of an offensive line that lost its projected two tackle starters to injuries months ago.
Each team took advantage of a long pass interference penalty to score during a penalty-filled first quarter. Josh Wilson's 37-yard penalty for yanking on Mike Wallace led to Mendenhall's 1-yard touchdown run on the Steelers' first possession.
On a third-and-15 play, Steelers backup Anthony Madison's 33-yard pass interference penalty set up Rice's 14-yard TD run up the middle.
Then it really got interesting.
After Roethlisberger threw incomplete on the Steelers' first play following the kickoff, Terrell Suggs knocked the ball loose from the quarterback as he tried to get off a pass. Roethlisberger pump faked but, before he could bring his right arm forward, the ball came out.
As Suggs celebrated the apparent incompletion, the ball lay on the turf for one, two, three full seconds. Haloti Ngata was closest to it but no one touched it until an alert Redding - realizing the whistle hadn't blown - picked it up and ran it into the end zone from the 13.
Even after a touchdown was signaled, no one from Pittsburgh moved.
Mendenhall fumbled on the Steelers' subsequent possession, Ed Reed recovered and Flacco threw a 4-yard TD pass to Heap. The Ravens were making it look easy in a rivalry in which no game is won easily. They should have known better.