Batherson also had an assist, Derick Brassard and Scott Sabourin scored, and Magnus Hellberg made 18 saves for Ottawa, which finished the preseason 5-3-0.
Cole Caufield and Kaiden Guhle scored, and Jake Allen made 26 saves for Montreal, which did not win a preseason game (0-6-2).
Caufield opened the scoring with a power-play goal from the left face-off circle to give the Canadiens a 1-0 lead at 8:47 of the first period.
Brassard, on a professional tryout contract with the Senators, tied it 1-1 at 3:48 of the second period by poking in a rebound for his first goal in four preseason games.
Brassard had an assist on Batherson’s game-winner.
Sabourin scored at 15:17 to put Ottawa ahead 2-1, beating Allen after initially losing his balance.
Guhle tied it 2-2 at 18:40.
Blues 6, Blackhawks 0: Jordan Binnington made 24 saves for the St. Louis Blues in a 6-0 win against the Chicago Blackhawks at the Enterprise Center in St. Louis. Louis.
Ivan Barbashev scored twice, and Jordan Kyrou had a goal and an assist for the Blues, who finished the preseason 6-2-0. Brayden Schenn, Robert Bortuzzo and Jake Neighbors each had two assists.
Petr Mrazek allowed six goals on 25 shots for the Blackhawks in their preseason finale (1-5-0).
The Blues scored three goals in 2:10 during the first period. Barbashev made it 1-0 at 9:48, deflecting a slap shot from Bortuzzo. Nikita Alexandrov scored 23 seconds later for a 2-0 lead at 10:11, tipping a shot from Bortuzzo.
Kyrou pushed it to 3-0 at 11:58 after a pass from Schenn.
Robert Thomas scored a power-play goal 2:59 into the second period for a 4-0 lead.
Ryan O’Reilly made it 5-0 at 10:19, and Barbashev scored again at 17:05 for the 6-0 final.
Binnington made nine saves in the third period.
Lightning 5, Panthers 2: Vladislav Namestnikov scored a natural hat trick and had an assist for the Tampa Bay Lightning in a 5-2 win against the Florida Panthers at Amalie Arena in Tampa.
Namestnikov, who signed a one-year, $2.5 million contract with Tampa Bay on July 13, finished the preseason with six points (five goals, one assist).
Nikita Kucherov and Brayden Point each had a goal and an assist, Corey Perry had three assists, and Andrei Vasilevskiy made 27 saves for the Lightning, who won their final game of the preseason (1-4-0).
Rudolfs Balcers scored, and Spencer Knight made 26 saves for the Panthers, who finished the preseason 2-4-0.
Kucherov scored his first goal of the preseason, a power-play goal from the right face-off circle, at 3:51 of the first period to give Tampa Bay a 1-0 lead.
Balcers tied it 1-1 at 5:15 with a slap shot from the top of the right circle.
Namestnikov made it 2-1 with a one-timer from the bottom of the right circle at 12:15, then extended it to 3-1 by banging in a cross-crease pass from Perry on a 5-on-3 at 19: 14.
He completed the hat trick at 7:30 of the second period off a pass Ross Colton.
Aleksi Heponiemi came out of the right corner and scored short-side to cut it to 4-2 at 8:45, but Point tapped in his first goal of the preseason at 4:56 of the third period for the 5-2 final.
Kings 6, Ducks 3: Arthur Kaliyev had a goal and two assists to help the Los Angeles Kings to a 6-3 win against the Anaheim Ducks at Crypto.com Arena in Los Angeles.
Sean Durzi and Carl Grundstrom each had a goal and an assist for Los Angeles, which ended its preseason 3-3-1. Jonathan Quick made 23 saves.
Troy Terry had a goal and an assist for Anaheim in its preseason finale (4-3-0).
John Gibson made 16 saves on 19 shots in the first period before leaving the game due to an upper-body injury. Anthony Stolarz made 14 saves in relief.
Gabriel Vilardi scored a power-play goal 2:32 into the first period to give the Kings a 1-0 lead, and Kaliyev made it 2-0 at 11:08 with a wrist shot from the top of the slot.
Grundstrom scored from the top of the left circle at 14:17 for a 3-0 lead.
The Ducks scored three straight goals in the second period to tie it. Mason McTavish made it 3-1 at 3:57, Max Jones scored on a 2-on-1 with Pavol Regenda at 10:37 to cut it to 3-2 and Terry tied it 3-3 with a power-play goal at 14:45.
Durzi gave Los Angeles a 4-3 lead with a bouncing wrist shot from the blue line at 17:22.
Phillip Danault scored from inside the crease at 9:47 of the third period to make it 5-3, and Kevin Fiala scored on a one-timer in front at 12:24 for the 6-3 final.
Video: Kings use balanced effort to top Ducks, 6-3
Wild 5, Stars 1: Kirill Kaprizov scored twice and had an assist for the Minnesota Wild in a 5-1 win against the Dallas Stars at Xcel Energy Center in St. Paul, Minnesota.
Mats Zuccarello had a goal and two assists, Marco Rossi got his seventh assist, and Marc-Andre Fleury made 22 saves for the Wild in their preseason finale (6-1-0).
Joe Pavelski scored for the Stars, who finished the preseason 2-5-0. Jake Oettinger allowed four goals on 20 shots over the first two periods, and Scott Wedgewood made seven saves in the third period.
Joel Eriksson Ek gave Minnesota a 1-0 lead at 3:57 of the first period, and Kaprizov scored on the power play at 8:49 to make it 2-0.
Brandon Duhaime extended the lead to 3-0 at 3:19 of the second period, but Pavelski cut it to 3-1 at 5:22.
Zuccarello restored the Wild’s three-goal lead at 11:48 to make it 4-1.
Kaprizov scored again on the power play at 14:15 of the third for the 5-1 final.
Video: Kaprizov, Zuccarello fuel Wild’s 5-1 win vs. Stars
Maple Leafs 5, Red Wings 1: Austin Matthews and William Nylander each scored two goals for the Toronto Maple Leafs in a 5-1 win against the Detroit Red Wings at Scotiabank Arena in Toronto.
Morgan Rielly and Mitchell Marner each had three assists, Alexander Kerfoot had two assists, and Matt Murray made 18 saves for the Maple Leafs, who finished the preseason 5-2-0.
Pius Suter scored, and Jussi Olkinuora made 13 saves on 15 shots in 31:55 for the Red Wings, who finished 3-5-0. Victor Brattstrom made eight saves in relief.
Suter gave Detroit a 1-0 lead with a shot that went down the bar from the right face-off circle at 11:33 of the first period.
Nylander tied it 1-1 at 15:24, also scoring from the right circle. Defenseman Mark Giordano had the primary assist, his fifth of the preseason.
Denis Malgin scored his fourth goal when he split the defense and beat Olkinuora glove side at 11:55 of the second period to give Toronto a 2-1 lead.
The Maple Leafs scored three power-play goals in the third period. Matthews made it 3-1 with a one-timer from the top of the left circle at 2:12. Nylander extended the lead to 4-1 at 7:02, picking up a loose puck in the right circle for his fourth goal of the preseason, and Matthews scored his second goal of the game from the high slot at 13:49 for the 5th. -1 final.
Toronto defenseman Jake Muzzin and forward Pierre Engvall each played his first game of the preseason.
Video: Nylander, Matthews score 2 each in a 5-1 preseason win
Devils 5 Bruins 3: Jack Hughes and Alexander Holtz each had a goal and an assist for the New Jersey Devils in a 5-3 win against the Boston Bruins at TD Garden in Boston.
Mackenzie Blackwood made 15 saves on 16 shots before Vitek Vanecek entered halfway through to make 12 saves for New Jersey, which finished the preseason 5-2-0.
Linus Ullmark made 22 saves for Boston, which went 3-3-0.
Holtz scored from the slot after a drop pass from Hughes at 18:10 of the first period to give the Devils a 1-0 lead.
David Pastrnak scored for the Bruins on a shot from the left circle at 7:59 of the second period to tie it 1-1, but Dawson Mercer tipped in a Dougie Hamilton shot at 11:44 to give New Jersey a 2-1 lead.
Hughes scored in front after a pass from Holtz behind the net 1:30 into the third period to make it 3-1 Devils, and Yegor Sharangovich scored from the right circle after a turnover at 2:59 to make it 4-1.
Jakub Lauko scored at 14:15 to pull the Bruins within 4-2, and Patrice Bergeron scored his first of the preseason at 17:14 to make it 4-3.
Tomas Tatar scored into the empty net with 18 seconds left for the 5-3 final.
Video: Hughes, Holtz power Devils past Bruins, 5-3
Capitals 4, Blue Jackets 3 (OT): Dylan Strome scored 39 seconds into overtime to give the Washington Capitals a 4-3 win against the Columbus Blue Jackets at Capital One Arena in Washington.
Strome scored on a redirection from a pass off the left post Connor Brown.
John Carlson had three assists, and Darcy Kuemper made 36 saves for Washington in its preseason finale (4-1-1).
Adam Boqvist had two assists, and Elvis Merzlikins made 28 saves for Columbus, which finished 4-3-1.
Anthony Mantha gave the Capitals a 1-0 lead with a shot off the front in a redirection Martin Fehervary at 9:56 of the first period.
Patrick Laine tied it 1-1 at 10:37, sweeping in a shot from between the circles, before Yegor Chinakhov gave the Blue Jackets a 2-1 lead on the power play at 14:58, his sixth goal of the preseason.
Alex Ovechkin‘s power-play goal at 19:47 tied it 2-2.
Sean Kuraly put Columbus ahead 3-2 at 3:25 of the second period, but Nic Dowd tied it 3-3 at 8:34.
Video: Carlson has 3 assists in a 4-3 preseason win
Islanders 3, Rangers 1: Ilya Sorokin made 28 saves for the New York Islanders in a 3-1 win against the New York Rangers at UBS Arena in Elmont, New York.
Kieffer Bellows and Mathew Barzal scored, and Josh Bailey had two assists for the Islanders in their preseason finale (4-2-0).
Kaapo Kakko scored for the Rangers, who finished 2-3-1. Igor Shesterkin made 13 saves.
Bellows finished a pass from Sebastian Aho at 9:06 of the first period to give the Islanders a 1-0 lead.
Barzal made it 2-0 with a wrist shot from the left circle at 16:16.
Sorokin made 12 saves in the second period to preserve the two-goal lead.
Zach Parise scored at 4:28 of the third period to make it 3-0.
Kakko cut it to 3-1 with his third goal of the preseason at 6:50.
Video: Barzal, Bellows score in a 3-1 win over the Rangers
Golden Knights 5, Coyotes 1: Nicolas Roy had a goal and an assist for the Vegas Golden Knights in a 5-1 win against the Arizona Coyotes at the Idaho Central Arena in Boise, Idaho.
Reilly Smith had two assists for Vegas, which ended its preseason 4-2-1. Logan Thompson allowed one goal on 15 shots, and Adin Hill made nine saves.
Travis Boyd scored for Arizona, which finished 0-6-1 in the preseason. Jon Gillies made 21 saves.
Chandler Stephenson gave the Golden Knights a 1-0 lead with a power-play goal at 5:55 of the first period.
Roy made it 2-0 at 7:47, and Jonathan Marchessault pushed it to 3-0 at 15:11 before Boyd cut it to 3-1 at 18:12.
Jack Eichel gave the Golden Knights a 4-1 lead at 2:12 of the third period on a power play when the puck deflected off his skate on a clearing pass from behind the net by a Coyotes defenseman. JJ Moser.
Alex Pietrangelo scored on a one-timer at 11:47 for the 5-1 final.
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