Anders Lee knocked the puck over the goal line for a split-second in the second period, and the visiting New York Islanders went on to a 2-1 victory over Detroit on Friday.
Lee was credited with a tiebreaking goal after a replay review, and the Islanders held on for their fifth straight victory at Joe Louis Arena. They have not lost at Detroit since 2003.
Detroit goalie Jimmy Howard left after the first period with a lower-body injury.
Devils 3, Lightning 2 - Patrik Elias scored the only goal of the shootout to give goaltender Keith Kinkaid his first NHL win, and host New Jersey beat Tampa Bay.
Elias got the winner with a backhand move that beat Evgeni Nabokov on the Devils' third shootout attempt.
Jets 2, Bruins 1 - Michael Hutchinson made 30 saves and Mathieu Perreault broke a tie with 23 seconds left in the second period in host Winnipeg's victory over Boston.
Tuukka Rask made 25 saves for the Bruins.
Senators 6, Ducks 2 - Mike Hoffman scored two goals, and Erik Karlsson had two assists as host Ottawa beat Anaheim.
Penguins defenseman Olli Maatta is the third member of the team to have mumps diagnosed.
The Penguins issued a statement Friday that Maatta tested positive for the virus and remains in isolation.
Goaltender Thomas Greiss and defenseman Robert Bortuzzo tested negative. Teammates Sidney Crosby and Beau Bennett were found to have mumps in the last week.
Gordie Howe's family said the hockey great has made a dramatic improvement after he participated in a stem-cell clinical trial.
The 86-year-old Howe had a serious stroke in late October.
In a statement released through the Detroit Red Wings, his family said his physical therapists have been "astonished" by his progress after a two-day, nonsurgical treatment earlier this month.