Bo Horvat scored on a breakaway at 5:55 of overtime Friday night to give the Vancouver Canucks a 4-3 victory over the defending champion St. Louis Blues and a 2-0 lead in the Western Conference series.

Horvat took a stretch pass from Quinn Hughes and chipped the puck through Jordan Binnington's legs.

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Vancouver Canucks' Bo Horvat (53) and Elias Pettersson (40) celebrate a goal on St. Louis Blues goalie Jordan Binnington (50) as Blues' Alexander Steen (20) reacts during the third period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Bo Horvat scored on a breakaway at 5:55 of overtime Friday night to give the Vancouver Canucks a 4-3 victory over the defending champion St. Louis Blues and a 2-0 lead in the Western Conference series.

Vancouver Canucks' Bo Horvat (53) scores on St. Louis Blues goalie Jordan Binnington (50) as Blues' Colton Parayko (55) defends during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

St. Louis overcame a 3-1 deficit in the third period to tie it, with David Perron redirecting in the tying goal with eight seconds left.

Vancouver Canucks' Zack MacEwen (71) and St. Louis Blues' Zach Sanford (12) fight during the second period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Horvat also scored twice in the opener and has six goals in the postseason.

Vancouver Canucks' Elias Pettersson (40) scores a goal on St. Louis Blues goalie Jordan Binnington (50) as Blues' Justin Faulk (72) defends during the third period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

NOTES: In the third period, Schenn hit Canucks defenseman Tyler Myers from behind. Meyers fell awkwardly head-first into the boards, stayed down for a few minutes and went to the dressing room under his own power. ... Vancouver was 2 of 3 on the power play. St. Louis was 1 of 6.

Vancouver Canucks' J.T. Miller (9) scores on St. Louis Blues goalie Jordan Binnington (50), although it was ruled no goal as the play was offside during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' J.T. Miller (9) scores on St. Louis Blues goalie Jordan Binnington (50), although it was ruled no goal as the play was offside during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Tyler Motte (64) is checked by St. Louis Blues' Jaden Schwartz (17) during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Tyler Motte (64) is checked by St. Louis Blues' Jaden Schwartz (17) during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

St. Louis Blues goalie Jordan Binnington (50) makes the save as players scramble in the crease against the Vancouver Canucks during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

St. Louis Blues goalie Jordan Binnington (50) makes the save as players scramble in the crease against the Vancouver Canucks during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Elias Pettersson (40) falls over St. Louis Blues goalie Jordan Binnington (50) during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Elias Pettersson (40) falls over St. Louis Blues goalie Jordan Binnington (50) during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) makes a save against the St. Louis Blues during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) makes a save against the St. Louis Blues during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) is scored on as St. Louis Blues' Jaden Schwartz (17) and Brayden Schenn (10) celebrate during the second period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) is scored on as St. Louis Blues' Jaden Schwartz (17) and Brayden Schenn (10) celebrate during the second period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Game 3 of the best-of seven series is Sunday.

Vancouver Canucks' Bo Horvat (53) and Elias Pettersson (40) celebrate a goal on St. Louis Blues goalie Jordan Binnington (50) as Blues' Alexander Steen (20) reacts during the third period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Bo Horvat (53) and Elias Pettersson (40) celebrate a goal on St. Louis Blues goalie Jordan Binnington (50) as Blues' Alexander Steen (20) reacts during the third period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

St. Louis overcame a 3-1 deficit in the third period to tie it, with David Perron redirecting in the tying goal with eight seconds left.

With Binnington pulled for the extra attacker, Alex Pietrangelo shot from the point, and Perron redirected it past Jacob Markstrom. It was initially waved off as a high stick, but ruled a goal on review.

Horvat opened the scoring in the first with an end-to-end, short-handed rush. Wheeling and picking up speed in his own faceoff circle, Horvat hit high gear through the neutral zone, blew past Brayden Schenn, turned Jaden Schwartz inside out and fired a wrist shot low past Binnington's blocker.

Vancouver Canucks' Bo Horvat (53) scores on St. Louis Blues goalie Jordan Binnington (50) as Blues' Colton Parayko (55) defends during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Bo Horvat (53) scores on St. Louis Blues goalie Jordan Binnington (50) as Blues' Colton Parayko (55) defends during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Horvat also scored twice in the opener and has six goals in the postseason.

Elias Pettersson and Tanner Pearson also scored for Vancouver, and Markstrom made 34 stops. Ryan O’Reilly and Sammy Blais added goals for the Blues, and Binnington turned back 21 shots.

Pearson made it 2-0 on a power-play midway through the second, and O’Reilly countered on another power play late in the period. Pettersson connected in a power play early in the third, and Blais made it a one-goal game with 10:58 to go.

Vancouver Canucks' Zack MacEwen (71) and St. Louis Blues' Zach Sanford (12) fight during the second period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Zack MacEwen (71) and St. Louis Blues' Zach Sanford (12) fight during the second period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

NOTES: In the third period, Schenn hit Canucks defenseman Tyler Myers from behind. Meyers fell awkwardly head-first into the boards, stayed down for a few minutes and went to the dressing room under his own power. ... Vancouver was 2 of 3 on the power play. St. Louis was 1 of 6.

Vancouver Canucks' Elias Pettersson (40) scores a goal on St. Louis Blues goalie Jordan Binnington (50) as Blues' Justin Faulk (72) defends during the third period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Elias Pettersson (40) scores a goal on St. Louis Blues goalie Jordan Binnington (50) as Blues' Justin Faulk (72) defends during the third period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' J.T. Miller (9) scores on St. Louis Blues goalie Jordan Binnington (50), although it was ruled no goal as the play was offside during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' J.T. Miller (9) scores on St. Louis Blues goalie Jordan Binnington (50), although it was ruled no goal as the play was offside during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Tyler Motte (64) is checked by St. Louis Blues' Jaden Schwartz (17) during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Tyler Motte (64) is checked by St. Louis Blues' Jaden Schwartz (17) during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

St. Louis Blues goalie Jordan Binnington (50) makes the save as players scramble in the crease against the Vancouver Canucks during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

St. Louis Blues goalie Jordan Binnington (50) makes the save as players scramble in the crease against the Vancouver Canucks during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Elias Pettersson (40) falls over St. Louis Blues goalie Jordan Binnington (50) during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks' Elias Pettersson (40) falls over St. Louis Blues goalie Jordan Binnington (50) during the first period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) makes a save against the St. Louis Blues during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) makes a save against the St. Louis Blues during the second period of a first-round NHL Stanley Cup playoff hockey series in Edmonton, Alberta, Friday Aug. 14, 2020. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) is scored on as St. Louis Blues' Jaden Schwartz (17) and Brayden Schenn (10) celebrate during the second period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)

Vancouver Canucks goalie Jacob Markstrom (25) is scored on as St. Louis Blues' Jaden Schwartz (17) and Brayden Schenn (10) celebrate during the second period of an NHL hockey Stanley Cup first-round playoff series, Friday, Aug. 14, 2020, in Edmonton, Alberta. (Jason FransonThe Canadian Press via AP)