DENVER — Johnny Gaudreau scored 37 seconds into overtime, Elias Lindholm had two goals and the red-hot Calgary Flames beat the Colorado Avalanche 4-3 on Saturday night in a matchup between two of the Western Conference’s top teams. Gaudreau took a pass off the boards from Lindholm and beat Pavel Francouz to the glove side for the winner. Erik Gudbranson added a goal for a Calgary team that is 13-1-1 over its last 15 games. This marked the first time this season the two teams that lead their respective divisions have squared off. But they will be well-acquainted by the end of this month as they meet three times. Dan Vladar finished with 32 saves, including a point-blank shot from Nazem Kadri late in the third period. Gabriel Landeskog, Andre Burakovsky and Nathan MacKinnon scored for Colorado, which lost a rare home game. The team is 21-1-2 over its last 24 home games. Francouz made 21 saves as he took over for Darcy Kuemper, pulled early in the second period after allowing thre...