Fleury made 26 saves for the Penguins but watched Backes' deflection carom off his glove and into the net just after a penalty against Malkin expired.
St. Louis bounced back from a one-sided loss at Philadelphia on Saturday to improve the league's best road record to 23-11-3. Pittsburgh's top-ranked power play went 0-for-5 a day after scoring three times in a win over Tampa Bay.
I downplayed the first one because I thought it's just a hockey game. We just want to win the game; it's against our rival and we want the two points. I downplayed it, but now having gone through the first one I look back and say, 'Geez, that was really cool.' I think as I've grown a bit older I've got a lot more appreciation for what we're allowed to do every day.
— Capitals forward Brooks Laich on the 2015 NHL Bridgestone Winter Classic, the second one of his career after 2011 in Pittsburgh