Chris Kunitz and Corey Perry also scored for the Ducks, who outshot Pittsburgh 40-17 while improving to an NHL-best 11-0-4. By earning at least one point in each of their first 15 games, they tied the 1984-85 Edmonton Oilers for the most consecutive games without a loss in regulation to start a season.
Dominic Moore and Chris Thorburn scored first-period goals for the Penguins, who concluded a four-game road trip with their second straight loss following a five-game winning streak. Sidney Crosby, who scored 39 goals last season as a rookie and became the youngest player in NHL history to record at least 100 points, did not have a shot on net for the third consecutive game.
Selanne had plenty of open ice to manoeuvre with the teams skating 4-on-3 in overtime, and he got in perfect position to redirect Scott Niedermayer's centring pass from the right circle. It was Selanne's 44th game-winning goal with the Ducks, tying Paul Kariya's franchise record.
The Penguins played without defenceman Mark Eaton, who dislocated his left wrist just 63 seconds into Saturday's 3-2 loss at San Jose and is scheduled to undergo surgery on Tuesday in Pittsburgh. Eaton, who leads the team with 36 blocked shots and is a key member of the penalty-killing unit, was injured when Jonathan Cheechoo of the Sharks rode him into the corner boards and landed on top of him.
Jocelyn Thibault made 16 of his 37 saves during the second period in his first start of the season. The 13-year veteran was 1-9-0 with a 4.46 goals-against average in 16 appearances last season before missing the final 40 games because of a hip injury that required surgery.
Anaheim had seven of the game's first eight power plays. The Ducks capitalized on Moore's holding penalty to tie the score at 13:13 of the second period, as Perry banged home a rebound of Niedermayer's one-timer.
Thorburn, playing in is 12th NHL game and 10th with Pittsburgh, put the Penguins ahead 2-1 at 10:49 of the first period when he pounced on a rebound of Evgeni Malkin's one-timer and backhanded it past Jean-Sebastien Giguere. Thorburn was claimed off waivers from Buffalo on Oct. 3 and is one of 10 Pittsburgh players who are younger than 25.
Kunitz opened the scoring at 3:29 of the first with his seventh goal, beating Thibault with a one-timer from 20 feet after Selanne played Andy McDonald's wide shot behind the net. But Anaheim's lead lasted just 21 seconds, as Moore dug the puck out of the right corner and jammed his own rebound past Giguere for his third goal in four games.
Notes: Eaton was replaced in Pittsburgh's lineup by D Brooks Orpik, who made his season debut after recovering from surgery on his broken hand. . . . Thibault's previous start was Jan. 6 in Atlanta, when he gave up three goals on nine shots and was benched 10 1/2 minutes into a 6-4 loss to the Thrashers. . . . Anaheim coach Randy Carlyle played in 397 games with the Penguins from 1978-84, recording 66 goals and 257 assists. . . . The Penguins played their first game in Anaheim since Dec. 15, 2002, when they lost 5-0 to Giguere and were outshot 47-19.