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Dennis Gilbert D | BUF
Sabres' Dennis Gilbert: Called up from AHL
Gilbert was promoted from the minors ahead of Tuesday's clash with Montreal, Paul Hamilton of WGR Sports Radio 550 reports.
Gilbert should be expected to immediately jump into the lineup Tuesday thanks to injuries to Rasmus Dahlin (upper body) and Matt Grzelcyk (undisclosed). In eight regular-season games for the Senators last year, the 29-year-old Gilbert notched one assist, two shots and 10 hits while averaging 12:41 of ice time.
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Mike Matheson D | MON
Canadiens' Mike Matheson: Ruled out against Sabres
Matheson is dealing with a lower-body injury that will sideline him versus Buffalo on Tuesday, Eric Engels of Sportsnet reports.
Matheson has yet to find the back of the net through five games this season while registering just one helper despite averaging 24:09 of ice time. With the 32-year-old blueliner on the shelf, the Habs will get back to utilizing just six defensemen, which means Owen Beck will get into the lineup Tuesday. With the team heading into a back-to-back, Matheson may be hard-pressed to get into the lineup against the Caps on Wednesday.
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Artem Zub D | OTT
Senators' Artem Zub: Unlikely to make season debut Tuesday
Zub (knee) is slated to remain sidelined against the Blues on Tuesday, per Mike Morreale of NHL.com.
While Zub more than likely won't play in Tuesday's game, he appears to be nearing a return to game action. The right-shot blueliner has been skating, and head coach Travis Green relayed after Monday's 4-1 win over New Jersey that he hopes to see Zub in the lineup soon. The 31-year-old Zub will eventually fill an important top-four role for the Senators, who are cruising to begin the season with a 5-1-0 record.
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Jake Sanderson D | OTT
Senators' Jake Sanderson: Not expected to suit up Tuesday
Sanderson (lower body) is not expected to be an option for Tuesday's home matchup against the Blues, Mike Morreale of NHL.com reports.
Head coach Travis Green said after Monday's 4-1 win over New Jersey that he doesn't think Sanderson or Artem Zub (knee) will be available Tuesday, but he hopes to see the defensemen in the lineup soon. Sanderson will almost certainly slot in on the top pairing and on the No. 1 power-play unit once he moves past his injury.
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Torey Krug D | STL
Blues' Torey Krug: Shifted to LTIR
Krug (ankle) was placed on long-term injured reserve by the Blues on Monday, per PuckPedia.
Krug's move to long-term injured reserve was partially a financial decision, as it allows the Blues to exceed the salary cap by $4 million. The 35-year-old blueliner hasn't played since the 2023-24 campaign, but he hasn't officially ruled out a return. Regardless of when he decides to hang up his skates, the 13-year NHL veteran will be remembered as an excellent two-way player, as he currently sits at 483 points, 621 hits and 832 blocked shots across 778 regular-season outings.
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Nikolas Matinpalo D | OTT
Senators' Nikolas Matinpalo: Exits Monday's clash
Matinpalo (upper body) will not return to Monday's road contest against New Jersey.
Matinpalo left Monday's clash after taking a big hit from Anthony Mantha in the first period, which resulted in a five-minute major for boarding. The 28-year-old blueliner has a plus-2 rating, four PIM, four shots on goal, four hits and eight blocked shots across five appearances to begin the 2026-27 campaign. He'll likely undergo further testing before information regarding the extent of his injury is revealed. If he can't go in Tuesday's game, Jorian Donovan will likely step into the lineup.
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Travis Mitchell D | ANA
Ducks' Travis Mitchell: Demoted to AHL
Mitchell was reassigned to AHL San Diego on Monday.
Mitchell being sent down is a good indication that Drew Helleson (lower body) will make his season debut Tuesday against the Flames. The 26-year-old Mitchell has not gotten on the scoresheet with the Ducks this season while accounting for six hits, seven blocks, nine PIM and a minus-3 rating over five appearances.
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Parker Wotherspoon D | LV
Golden Knights' Parker Wotherspoon: Considered week-to-week
Wotherspoon is dealing with an upper-body injury and is considered week-to-week, the Golden Knights announced Monday.
Wotherspoon being sidelined provides context for the Golden Knights calling up Ville Heinola on Sunday. Prior to sustaining the injury, the 29-year-old Wotherspoon had posted zero points, a minus-6 rating, five shots on net, five hits and five blocked shots across six appearances. While he is sidelined, Heinola and Jeremy Lauzon should see elevated roles in the meantime
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Ryan Johnson D | PIT
Penguins' Ryan Johnson: Traded to Pittsburgh
Johnson was traded to the Penguins from the Sabres on Monday in exchange for Caleb Jones and Daniel Laatsch.
After making 41 regular-season appearances for the Sabres during the 2023-24 campaign, Johnson has been limited to three regular-season games at the NHL level in each of the past two seasons. Across his 47 regular-season outings with Buffalo, he's recorded no goals, seven assists, 46 blocked shots, 18 PIM and 11 hits while averaging 13:47 of ice time. He began the 2026-27 season in the minors and should head to AHL Wilkes-Barre/Scranton following Monday's trade.
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Owen Power D | BUF
Sabres' Owen Power: Two-assist showing
Power recorded two assists and a plus-3 rating in Monday's 5-3 win over Florida.
Power set up Ryan McLeod's and Tage Thompson's goals while logging a team-high 26:31 of ice time, in part due to Rasmus Dahlin's upper-body injury. Power is up to six assists on the season and should remain on Buffalo's top power-play unit heading into Tuesday's matchup with Montreal.