Johnny Gaudreau scored in overtime for the Calgary Flames in a 6-5 win over the visiting Philadelphia Flyers.
The Flames (20-10-2) regained first place in the NHL's Western Conference vaulting over the Nashville Predators, which are at home Thursday to the Vancouver Canucks.
The Flames topped the conference Saturday when they downed the Preds 5-2, but Nashville had pulled ahead with a win over the Ottawa Senators.
Philadelphia (12-13-4) continues to toil in the Eastern Conference's bottom tier.
The Flyers are 2-2-1 since the Nov. 30 firing of general manager Ron Hextall. Chuck Fletcher replaced him four days later.
Sean Monahan had a pair of goals and Matthew Tkachuk had four assists.