Ottawa Senators Daniel Alfredsson (11) celebrates with teammates Milan Michalek (9), Sergei Gonchar (55) and Mika Zibanejad (93) in the third period of game four of the Eastern Conference Stanley Cup semi-final NHL hockey action on Sunday May 19, 2013 in Ottawa. (AP Photo/The Canadian Press, Fred Chartrand)The Associated Press
Ottawa Senators goaltender Craig Anderson, left, makes a save while Pittsburgh Penguins Brandon Sutter and Senators Daniel Alfredsson jostle in front of the net during the first overtime period of game four of their Stanley Cup Eastern Conference semi-final NHL hockey game at Scotiabank Place in Ottawa on Sunday, May 19, 2013. (AP Photo/The Canadian Press, Patrick Doyle)The Associated Press
Ottawa Senators' Daniel Alfredsson (11) celebrates as he scores on Pittsburgh Penguins goaltender Tomas Vokoun (92) during the third period of Game 4 of the Eastern Conference Stanley Cup semifinal NHL hockey series on Sunday, May 19, 2013, in Ottawa. (AP Photo/The Canadian Press, Fred Chartrand)The Associated Press
Ottawa Senators' Zack Smith, left, trips over Pittsburgh Penguins' Matt Niskanen during the first period of Game 4 of their NHL Stanley Cup Eastern Conference semifinal NHL hockey series in Ottawa on Sunday, May 19, 2013. (AP Photo/The Canadian Press, Patrick Doyle)The Associated Press
OTTAWA – Colin Greening scored 7:39 into double overtime, and the Ottawa Senators rallied for a 2-1 victory over the Pittsburgh Penguins that cut their series deficit to 2-1 on Sunday night.
Daniel Alfredsson got Ottawa even 1-1 by scoring a short-handed goal with 29 seconds left in regulation just after the Senators pulled goalie Craig Anderson for an extra skater.
Anderson made 49 saves, including 18 after regulation. Tomas Vokoun stopped 46 shots for Pittsburgh and took his first loss (4-1) since taking over for No. 1 Penguins goalie Marc-Andre Fleury.
Game 4 of the Eastern Conference semifinal series will be in Ottawa on Wednesday.
Tyler Kennedy scored with just over a minute to play in the second period to give the Penguins a 1-0 lead. That goal stood up until Alfredsson tied it in the closing seconds of the third.