Nate Thompson scored twice, including the winner at 4:36 of overtime, to give the Tampa Bay Lightning a 2-1 victory over the Montreal Canadiens.
Ben Bishop stopped 28 shots for Tampa Bay, which ended a two-game losing streak.
Daniel Briere scored for Montreal whilst Carey Price made 34 saves.
The Lightning have a five-point advantage over the Canadiens in the Atlantic Division.
Philadelphia's Steve Mason posted his second shutout in three games with 35 saves while Wayne Simmonds scored his 100th NHL goal to lead the Flyers over the Los Angeles Kings 2-0.
It was the 22nd career shutout and third this season for Mason, who stopped 33 shots in a 5-0 win against Detroit last Tuesday after getting pulled by coach Craig Berube in two of his previous three starts.
Mason got a break with less than 3½ minutes left, when Justin Williams tried a wraparound and hit the left post.
Claude Giroux added his 17th goal on a power play with 1:58 left, converting a cross-ice pass at the left of the crease from Scott Hartnell while Matt Greene was serving an interference penalty.
Sabres recieve trouncing
At Denver, Jamie McGinn had two goals and an assist, and Gabriel Landeskog also had two goals as the Colorado Avalanche trounced the Buffalo Sabres 7-1.
Nathan MacKinnon had a goal and two assists and Semyon Varlamov had 27 saves for the Avalanche, who have won three straight.
Marc-Andre Cliche scored his first NHL goal and Tyson Barrie also scored for the Avalanche.
The Boston Bruins blanked the Edmonton Oilers 4-0 after David Krejci scored a second-period power-play goal and Chad Johnson made 22 saves for his second career shutout, while Phoenix's Zbynek Michalek scored against his former team, his first goal in 83 games, as the Coyotes downed the Pittsburgh Penguins 3-1.
Linemates Ryan Johansen and Boone Jenner each had a goal and an assist in the first period to lead the Columbus Blue Jackets past the Florida Panthers 4-1 and Phil Kessel scored three goals in the Toronto Maple Leafs' 6-3 victory over the Ottawa Senators.
In other games, the St. Louis Blues edged the Nashville Predators 4-3 after a shootout, the Dallas Stars shut out the Anaheim Ducks 2-0, the Calgary Flames beat the Minnesota Wild 4-3 in overtime and the San Jose Sharks were 2-1 winners over the Chicago Blackhawks after perfect shootout.