SAN FRANCISCO -- From the swirling winds off the bay that can play fits with the football to the 1989 earthquake that rocked the World Series, Candlestick Park has long been an unpredictable venue known for its challenges.

Monday Night Football nearly became a Monday Night Fiasco when everything went dark -- twice.

San Francisco's lights-out return to prime time in a 20-3 victory over the Steelers helped salvage what could have been an embarrassing evening for everyone involved on the NFL's biggest stage after a pair of power outages delayed the game for close to 35 minutes in all.

"I just feel like San Francisco took a big step to show the NFL and to show the state of California that they need a new stadium," Steelers safety Ryan Clark said. "I think it was a very strategic move, and Candlestick may be no more."

Good thing there's a state-of-the-art $1 billion stadium in the works.

The 49ers rode their top-ranked run defense once again to keep ailing Pittsburgh quarterback Ben Roethlisberger off balance and maintain a hold on the NFC's No. 2 playoff seed and a first-round bye.

"Electric atmosphere tonight," tweeted team president Jed York -- unclear if his pun was intended.

Vernon Davis caught a 1-yard touchdown pass for the 49ers (11-3) one play after setting himself up with a 21-yard reception from Alex Smith, Frank Gore ran for a 5-yard score and David Akers kicked field goals of 22 and 38 yards to overtake Hall of Famer Jerry Rice for San Francisco's single-season scoring record.