The unofficial second half of the NHL season began Tuesday with a dozen games. Five Canadian teams were involved in the competition, including the Edmonton Oilers, who welcomed back Connor McDavid to their lineup. Here's how the Canadian teams fared.

McDavid leads Oilers romp 

After 37 games on the sidelines, Connor McDavid played like he'd never been away, leading the Oilers to a 5-1 home-ice triumph over the Columbus Blue Jackets.

McDavid, who had 12 points in his first 13 NHl games before breaking his collarbone, had a sensational goal plus two assists to lead Edmonton to their first win in four games.

He sped through three defenders before beating Blue Jackets goalie Joonas Korpisalo to break a 1-1 tie. Later, McDavid assisted on power play goals by Benooit Pouliot and Jordan Eberle as the Oilers pulled away.

Connor McDavid scores beautiful goal in Oilers' rout of Jackets0:24

Canadiens' woes continue

Two goals by Wayne Simmons led the Flyers to a 4-2 triumph over the Canadiens in Philadlephia.

Simmons opened the scoring for the Flyers with the first of two power-play goals. Brayden Schenn had the other.

The Canadiens, averaging less than two goals a game since December, evened the game on goals by Andrei Markov and Jeff Petry.

But Simmons snapped the tie with his 16th goal of the season and Matt Read added an empty-net goal to send the Canadiens to a third straight loss.

Montreal has lost 20 of its last 25 games.

Flyers extend Habs losing streak0:23

Leafs rally to beat Bruins

P.A. Parenteau scored in overtime as the Leafs defeated the Boston Bruins 4-3.

The game was tied 1-1 heading into the third period, but Boston scored twice in the first one minute and 21 seconds of the period to open up a 3-1 lead.

Leafs' forward Leo Komarov scored with 11 minutes left in the period, and Nazem Kadri tied the game up just two minutes later, eventually sending the game to overtime. 

Kadri then assisted on Parenteau's overtime winner after Boston's David Krejci sent Toronto to the power play in the extra frame.

Leafs claw back to beat Bruins0:23

Senators scuttled by Crosby hat trick

The Ottawa Senators got into a regulation shootout with the Penguins in Pittsburgh and fell victim to a Sidney Crosby hat trick, losing 6-5.

Ottawa came back from an early deficit to take a 4-3 lead midway through the second period before Crosby caught fire.

Crosby scored a pair of power-play goals in the second period to put the Penguins on top and scored a third consecutive goal in the third period for a 6-4 lead. it was Crosby's first natural hat trick in five years.

Jean-Gabriel Pageau, Mark Stone, Cody Ceci, Chris Wideman and Dave Dziurzynski had the Ottawa goals.

Sidney Crosby leads Penguins over Senators0:24

Jets grounded by Stars' attack

Tyler Seguin scored two of Dallas' five goals on the night in a 5-3 victory over the Winnipeg Jets. 

The Jets held a 2-1 lead late in the second period, but that's when the Stars went off, scoring two quick goals at the end of the period to enter the third with a 3-2 lead.

Andrew Ladd, Adam Lowry and Dustin Byfuglien provided the goals for Winnipeg.

Stars defeat Jets in Winnipeg0:26