Atlantic Division Injuries: Barkov Out 6-8 Weeks, Marchand and Demidov Hurt

Atlantic Division injuries: the week in one place

The Atlantic Division injuries are piling up before the season is two weeks old. On Oct. 6, the Florida Panthers announced Aleksander Barkov will miss six to eight weeks with a lower-body injury, the Montreal Canadiens said Ivan Demidov is out two to four weeks, and that night Brad Marchand was helped off the ice in Los Angeles holding his left knee. Ottawa is already without Jake Sanderson for at least two games.

For the Toronto Maple Leafs, a 2-2-0 team heading out on a three-game western trip, none of this is a reason to celebrate anyone's injury. It is a reason to pay attention. The Atlantic is the division Toronto has to climb through, and several of its best players will be watching from the press box through October.

LeafsLurker's view: the Panthers' situation is the one that matters most, and it is the biggest opening Toronto has had against Florida in years. Whether the Leafs can use it depends on the next ten games, not the next ten weeks.

The injury list at a glance

Here is the current picture across the division, based on team announcements and reporting from NHL.com, TSN and Daily Faceoff:

PlayerTeamInjuryTimelineAleksander BarkovFlorida PanthersLower body, non-surgicalSix to eight weeksBrad MarchandFlorida PanthersApparent left knee/legTo be evaluated ThursdayIvan DemidovMontreal CanadiensLower bodyTwo to four weeksJake SandersonOttawa SenatorsLower body, re-aggravatedAt least two games, further testing

Florida: Barkov out, Marchand hurt

Barkov's injury is the cruellest of the lot. The Panthers captain, 31, missed all of 2025-26 with a right knee injury. He was playing just his second game back on Oct. 1 when he went down awkwardly battling for the puck in the right corner during a power play. Florida feared the worst. The diagnosis, announced Oct. 6, was six to eight weeks and no surgery.

"He's scheduled to be out 6-8 weeks, non-surgical rehab, and that's our best window. Could be a little less, could be a little more," head coach Paul Maurice said, per NHL.com. In the meantime, Sam Reinhart has moved from the wing to centre, alongside Sam Bennett, Anton Lundell and Lars Eller down the middle. We covered the first scare, and what it meant for the trade market, in our piece on Barkov and the Dylan Larkin domino.

Then came Tuesday. In a 2-1 Florida win over the Kings at Crypto.com Arena, Marchand drove the net, was high-sticked by Kings defenceman Brandt Clarke and twisted awkwardly into the right post with 53 seconds left in the second period. He held his left knee on the ice and had to be helped off. Marchand, 38, was playing only his second game of the season after missing the first two while recovering from off-season surgery.

Maurice had no update after the game. "We'll get him looked at probably Thursday," he said, per NHL.com. Until Florida says otherwise, treat Marchand as week-to-week at best.

If both are out for an extended stretch, Florida is without its captain and its most dangerous agitator at the same time. The Panthers are still deep, with Reinhart, Bennett and Brady Tkachuk, acquired from Ottawa in June, whose Florida debut we flagged as an Atlantic warning. But this is the thinnest they have looked at centre in a long time.

Montreal: Demidov sidelined

The Canadiens beat Toronto 3-2 on opening night, and Demidov was part of a dangerous Montreal top six. Now the 20-year-old will miss two to four weeks with a lower-body injury, the team announced Oct. 6. He had missed Monday's practice for what Montreal first called a therapy day. The belief, per TSN, is that he was hurt in the Canadiens' 3-2 overtime preseason win over Ottawa in the Kraft Hockeyville game in Trois-Rivières on Sept. 24.

Demidov had a goal and an assist in two games and had never missed a game as a Canadien before this. Kirby Dach moves up to the second line with Juraj Slafkovsky and Alex Newhook, and Florian Xhekaj draws into the lineup. Montreal's top line is untouched, but the drop-off from Demidov to Dach on the second unit is real, especially on the power play.

Ottawa: Sanderson's lingering injury

Sanderson's injury happened against Toronto. The Senators' top defenceman re-aggravated an undisclosed lower-body injury and left at 12:45 of the first period of Ottawa's 3-2 win at Scotiabank Arena on Oct. 3. He was ruled out for at least the games in Boston on Oct. 5 and Detroit on Oct. 6, and TSN reported he was sent back to Ottawa for further testing.

Ottawa beat the Leafs without him for most of that night, which says something about how that game went for Toronto. We covered the loss in our Senators recap. A Senators blue line without Sanderson for any length of time is a much more ordinary group.

What this means for the Maple Leafs

The direct impact is limited for now. According to Toronto's schedule, the Leafs spend the next week in the West, with games at Vegas on Oct. 8, Colorado on Oct. 10 and Utah on Oct. 13. The indirect impact is the standings. Every point Florida, Montreal or Ottawa drops while short-handed is a point Toronto can make up without playing them.

That only matters if Toronto banks its own points. A 2-2-0 start with two one-goal losses and a comeback win is not a team in a position to profit from anyone else's misfortune yet. The Leafs need a .500-or-better trip before the division's injury list is worth anything to them.

There is also a roster lesson in all of this. Toronto has its own long-term injured reserve list, with Max Domi and Dakota Joshua among the players whose cap hits sit on LTIR, per our contracts page. Depth is what gets a team through October and November when the injuries come, and every team in this division is learning that at once.

LeafsLurker's take

Two things can be true. Nobody should cheer a 31-year-old's knee going out again after he missed a full season, or a 38-year-old taking a stick and crashing into a post. And from Toronto's chair, the six-to-eight-week window on Barkov is the most important competitive development in the Atlantic so far this season.

The Panthers have won the division's big games for years because of what Barkov does at centre and what Marchand does to opponents' patience. If Florida spends November without both, the Atlantic has no clear favourite for the first time in a while. The team that grabs that space will not be the one with the best roster on paper. It will be the one that stacks wins while the others are patching holes.

Toronto has the top-end talent to be that team. It has not yet shown it has the 60-minute consistency. The road trip is the place to start.

What's next

Watch for Florida's update on Marchand after his evaluation, expected Thursday, Oct. 8, and for word on Sanderson's testing in Ottawa. Demidov's two-to-four-week window puts his return somewhere between Oct. 20 and early November. Keep an eye on our standings page as the division sorts itself out without some of its stars.