Montreal was playing for the first time since a 5-4 home shootout victory over the Vancouver Canucks on March 20. Two days later, Jesperi Kotkaniemi and Joel Armia went on the NHL's COVID list. As a result, the Canadiens had four games postponed -- three with Edmonton and another against Ottawa.
''I think we knew we were going to have energy,'' Montreal captain Shea Weber said. ''Obviously rest is key, especially in a season like this where it's tough to get rest.
''We just harped on the little things like keeping it simple, especially early on trying to get back into it.''
With its revised schedule, Montreal faces playing its remaining 24 games in 42 days. Kotkaniemi was removed from the COVID list Monday and scored Tuesday. Armia remains sidelined.
Tomas Tatar also scored for Montreal (15-8-9). Carey Price stopped 16 shots for the shutout, his first of the season and the 49th of his career.
''Breaks are hard to come by in a season like this,'' Weber said. ''Ask us in a month how we're going to feel playing every second night and back-to-backs.
''It's going to be a lot different story.''
Connor McDavid had a goal disallowed for Edmonton (22-14-1), which was coming off a 3-2 overtime road win over the Toronto Maple Leafs on Monday night. McDavid had his 11-game point streak (seven goals, 16 assists) snapped, yet still leads the NHL in scoring with 63 points (21 goals, 42 assists).
''You can't let them get going,'' Dominique Ducharme, Montreal's interim head coach, said of Edmonton's top scorers. ''With our forwards you need to gap up on them early and be on them quick so that they cannot get going.
''That was one thing that I thought as a team we did (well). We had different lines playing against him (McDavid) and Draisaitl and overall we did a good job on that. Defensively in our zone, just keeping everything to the outside and taking time and space away.''
Mikko Koskinen finished with 28 saves in the loss.
Montreal was still without Tyler Toffoli (lower-body injury), who has a team-high 18 goals. Eric Staal, acquired from Buffalo on Friday for 2021 third- and fifth-round picks, didn't play as he must serve a mandatory quarantine first.
Kotkaniemi needed just 18 seconds to open the scoring with his fifth of the season. After Kotkaniemi converted Paul Byron's centering pass, Montreal went on the power play following Edmonton's challenge of the goal being unsuccessful.
After failing to convert on the power play, Montreal went ahead 2-0 on Lehkonen's third of the year at 3:23. It took Edmonton more than five minutes to register its first shot on goal after the Canadiens had eight.
Gallagher gave Montreal its three-goal advantage at 15:59, diving to tap in a rebound for his 13th goal as the Canadiens outshot Edmonton 15-7.
McDavid scored what would've been his 22nd goal at 13:55 of the second, but it was called off by a successful Montreal offside challenge.
The Canadiens countered with Tatar's seventh of the season following a long setup pass from Danault at 17:54.
NOTES: Veteran forward Michael Frolik made his season debut for Montreal. The 33-year-old winger signed a one-year contract as a free agent during the off-season and had been on the team's taxi squad.
Oilers: Host Calgary Flames on Friday.
Canadiens: Take on the Senators in Ottawa on Thursday in first game of a home-and-home.
More AP NHL: https://apnews.com/hub/NHL and https://twitter.com/AP-Sports
Copyright 2021 STATS LLC and Associated Press. Any commercial use or distribution without the express written consent of STATS LLC and Associated Press is strictly prohibited.