Brendan Gallagher had a goal and two assists and the Montreal Canadiens beat the defending Stanley Cup champion St. Louis Blues 6-3 on Saturday night.

Tomas Tatar, Jonathan Drouin, Philip Danault, Arturri Lehkonen, and Max Domi also scored for Montreal.

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Montreal Canadiens goaltender Carey Price looks back on his goal after being scored on by St. Louis Blues' Vince Dunn (29) during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Brendan Gallagher had a goal and two assists and the Montreal Canadiens beat the defending Stanley Cup champion St. Louis Blues 6-3 on Saturday night.

Montreal Canadiens' Phillip Danault (24) celebrates with teammate Brendan Gallagher after scoring during second period NHL hockey action against the St. Louis Blues, in Montreal, Saturday, Oct.12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal goalie Carey Price made 26 saves. Jordan Binnington stopped 31 shots for the Blues.

Montreal Canadiens' Brendan Gallagher (11) checks St. Louis Blues' Colton Parayko during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Schenn tied the game 1-1 with 2:03 left in the period, firing a shot that banked off the inside post past Price.

St. Louis Blues' Oskar Sundqvist (70) moves in on Montreal Canadiens goaltender Carey Price as Canadiens' Brett Kulak defends during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Dunn made it 3-2 by scoring a power-play goal 11 minutes later.

St. Louis Blues' Sammy Blais (9) celebrates with teammate Ryan O'Reilly (90) after scoring during second period NHL hockey action against the Montreal Canadiens, in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Gallagher and Domi added insurance goals in the third.

St. Louis Blues goaltender Jordan Binnington makes a save against Montreal Canadiens' Artturi Lehkonen during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues goaltender Jordan Binnington makes a save against Montreal Canadiens' Artturi Lehkonen during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Artturi Lehkonen collides with St. Louis Blues goaltender Jordan Binnington during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Artturi Lehkonen collides with St. Louis Blues goaltender Jordan Binnington during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues goaltender Jordan Binnington is scored on by Montreal Canadiens' Tomas Tatar, not shown, as Canadiens' Brendan Gallagher (11) and Blues' Alex Pietrangelo look for a rebound during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues goaltender Jordan Binnington is scored on by Montreal Canadiens' Tomas Tatar, not shown, as Canadiens' Brendan Gallagher (11) and Blues' Alex Pietrangelo look for a rebound during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Tomas Tatar (90) celebrates with teammates Brendan Gallagher (11), Phillip Danault (24) and Ben Chiarot after scoring during first period NHL hockey action against the St. Louis Blues, in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Tomas Tatar (90) celebrates with teammates Brendan Gallagher (11), Phillip Danault (24) and Ben Chiarot after scoring during first period NHL hockey action against the St. Louis Blues, in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Brayden Schenn, Samuel Blais, and Vince Dunn scored for St. Louis.

Montreal Canadiens goaltender Carey Price looks back on his goal after being scored on by St. Louis Blues' Vince Dunn (29) during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens goaltender Carey Price looks back on his goal after being scored on by St. Louis Blues' Vince Dunn (29) during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal goalie Carey Price made 26 saves. Jordan Binnington stopped 31 shots for the Blues.

The Canadiens, playing their third game in four nights, earned their first regulation victory of the season.

Tatar tipped a bouncing puck past Binnington in the first-period to open the scoring. It was his second goal of the season.

Montreal Canadiens' Phillip Danault (24) celebrates with teammate Brendan Gallagher after scoring during second period NHL hockey action against the St. Louis Blues, in Montreal, Saturday, Oct.12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Phillip Danault (24) celebrates with teammate Brendan Gallagher after scoring during second period NHL hockey action against the St. Louis Blues, in Montreal, Saturday, Oct.12, 2019. (Graham HughesThe Canadian Press via AP)

Schenn tied the game 1-1 with 2:03 left in the period, firing a shot that banked off the inside post past Price.

Less than a minute later, Drouin responded with a goal of his own. He skated into the offensive zone and fired a shot past Binnington as two Blues defenders closed in. Drouin has at least a point in each game he's played this season.

The Blues tied the game in the second period when Blais scored a goal off a tight angle.

Montreal Canadiens' Brendan Gallagher (11) checks St. Louis Blues' Colton Parayko during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Brendan Gallagher (11) checks St. Louis Blues' Colton Parayko during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Dunn made it 3-2 by scoring a power-play goal 11 minutes later.

St. Louis' advantage lasted less than three minutes. Danault tied it at 15:35 of the second period.

Lehkonen scored the eventual winner for Montreal at 7:30 of the third period. He wrapped around Binnington and jammed the puck underneath the goalie's left pad, stabbing at it until it went in the net.

St. Louis Blues' Oskar Sundqvist (70) moves in on Montreal Canadiens goaltender Carey Price as Canadiens' Brett Kulak defends during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues' Oskar Sundqvist (70) moves in on Montreal Canadiens goaltender Carey Price as Canadiens' Brett Kulak defends during second period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Gallagher and Domi added insurance goals in the third.

UP NEXT

Blues: At Nassau Coliseum to face the New York Islanders on Monday.

Canadiens: Host the Tampa Bay Lightning on Tuesday.

More AP NHL: https://apnews.com/NHL and https://twitter.com/AP_Sports

St. Louis Blues' Sammy Blais (9) celebrates with teammate Ryan O'Reilly (90) after scoring during second period NHL hockey action against the Montreal Canadiens, in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues' Sammy Blais (9) celebrates with teammate Ryan O'Reilly (90) after scoring during second period NHL hockey action against the Montreal Canadiens, in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues goaltender Jordan Binnington makes a save against Montreal Canadiens' Artturi Lehkonen during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues goaltender Jordan Binnington makes a save against Montreal Canadiens' Artturi Lehkonen during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Artturi Lehkonen collides with St. Louis Blues goaltender Jordan Binnington during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Artturi Lehkonen collides with St. Louis Blues goaltender Jordan Binnington during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues goaltender Jordan Binnington is scored on by Montreal Canadiens' Tomas Tatar, not shown, as Canadiens' Brendan Gallagher (11) and Blues' Alex Pietrangelo look for a rebound during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

St. Louis Blues goaltender Jordan Binnington is scored on by Montreal Canadiens' Tomas Tatar, not shown, as Canadiens' Brendan Gallagher (11) and Blues' Alex Pietrangelo look for a rebound during first period NHL hockey action in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Tomas Tatar (90) celebrates with teammates Brendan Gallagher (11), Phillip Danault (24) and Ben Chiarot after scoring during first period NHL hockey action against the St. Louis Blues, in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Tomas Tatar (90) celebrates with teammates Brendan Gallagher (11), Phillip Danault (24) and Ben Chiarot after scoring during first period NHL hockey action against the St. Louis Blues, in Montreal, Saturday, Oct. 12, 2019. (Graham HughesThe Canadian Press via AP)