Matinpalo will fill in for Travis Hamonic, who was a late scratch due to an undisclosed injury. Matinpalo is yet to register a point in 23 games this season.

Hamonic was a surprise scratch on Monday, with the team not announcing his absence prior to warmups. We should get an update on his status ahead of Ottawa's game in Philadelphia on Tuesday.

The Sabres are coming off a monumental 4-3 come-from-behind overtime win over the New York Rangers in a heated race for a Wild Card spot in the Eastern Conference. They will roll with Ullmark between the pipes on Monday against the Detroit Red Wings. The 31-year-old Ullmark has an ugly 3.19 GAA and .893 SV% in his last four games but has salvaged a 3-0-1 record. He has a 2.73 GAA and .908 SV% in 31 appearances this season (15-11-3). The Senators enter Monday's contest as -160 home favorites against a Red Wings team amid a five-game losing skid (0-5-0).

The Senators acquired Fabian Zetterlund, Tristen Robins, and a 4th Round Pick from the Sharks for Zack Ostapchuk, Noah Gregor, and a 2025 2nd Round Pick before Friday's trade deadline. Zetterlund had been an effective secondary scorer for the Sharks the previous two seasons, including scoring 36 points (17G / 19A) in 64 games this season.

The Sabres are coming off a monumental 4-3 come-from-behind overtime win over the New York Rangers in a heated race for a Wild Card spot in the Eastern Conference. They will likely roll with Ullmark between the pipes on Monday against the Detroit Red Wings. The 31-year-old Ullmark has an ugly 3.19 GAA and .893 SV% in his last four games but has salvaged a 3-0-1 record. He has a 2.73 GAA and .908 SV% in 31 appearances this season (15-11-3). The Senators enter Monday's contest as -160 home favorites against a Red Wings team amid a five-game losing skid (0-5-0).

The Senators acquired Dennis Gilbert, Dylan Cozens and a 2026 2nd Round Pick from the Sabres for Josh Norris and Jacob Bernard-Docker. Gilbert has only played 25 games this season, averaging 10:04 time-on-ice, but will add needed depth the the Senators blueline. The 28-year-old defenseman has five points (0G / 5A), 29 blocks, and 52 hits this season.

The Senators acquired Dylan Cozens, Dennis Gilbert and a 2026 2nd Round Pick from the Sabres for Josh Norris and Jacob Bernard-Docker. After a breakout 2022-23 season, scoring 68 points (31G / 37A) in 81 games, Cozens has not lived up to expectations in Buffalo, scoring only 78 points (29G / 49A) in 140 games in two seasons since. The 23-year-old Cozens will get the opportunity to re-establish his game in Ottawa with a group of talented young forwards. Cozens will likely take Josh Norris' former spot on Ottawa's top line, playing between David Perron and Drake Batherson.

Robins was a second-round pick, 56th overall, in the 2020 NHL Entry Draft. The 23-year-old has spent the entirety of the 2024-25 season in the AHL, scoring 18 points (7G / 11A) in 41 games with the San Jose Barracuda.

The acquisition of Zetterlund caps a busy trade deadline for the Senators. Zetterlund has been an effective secondary scorer for the Sharks the previous two seasons, including scoring 36 points (17G / 19A) in 64 games this season.

Kleven has not played since February 26th due to a lower-body injury but could return to the lineup on Saturday. The 23-year-old Kleven is averaging 14:19 time-on-ice, recording four points (2G / 2A), 76 blocks, and 70 hits in 58 games this season.

Gilbert has only played 25 games this season, averaging 10:04 time-on-ice, but will add needed depth the the Senators blueline. The 28-year-old defenseman has five points (0G / 5A), 29 blocks, and 52 hits this season.

After a breakout 2022-23 season, scoring 68 points (31G / 37A) in 81 games, Cozens has not lived up to expectations in Buffalo, scoring only 78 points (29G / 49A) in 140 games in two seasons since. The 23-year-old Cozens will get the opportunity to re-establish his game in Ottawa with a group of talented young forwards. Cozens will likely take Josh Norris' former spot on Ottawa's top line, playing between David Perron and Drake Batherson.

Chabot saw 14:07 of ice time in Wednesday night's game in Chicago before ultimately being unable to suit up for the third period. We should get an update on his status ahead of Ottawa's game against the Rangers on Saturday.

The Senators are coming off a 5-4 shootout loss to the Washington Capitals and will attempt to rebound on Wednesday, turning to Ullmark between the pipes against the Chicago Blackhawks. Despite allowing four goals, Ullmark played well in his last outing, saving 37 shots (.902 SV%). He has a 2.71 GAA and .911 SV% in 29 appearances this season (13-11-3). The Senators enter the action on Wednesday as sizeable -236 road favorites against a Blackhawks squad that has scored 18 goals in their last three games (2-1-0).

The Senators are coming off a 5-4 shootout loss to the Washington Capitals and will attempt to rebound on Wednesday, likely turning to Ullmark between the pipes against the Chicago Blackhawks. Despite allowing four goals, Ullmark played well in his last outing, saving 37 shots (.902 SV%). He has a 2.71 GAA and .911 SV% in 29 appearances this season (13-11-3). The Senators enter the action on Wednesday as sizeable -236 road favorites against a Blackhawks squad that has scored 18 goals in their last three games (2-1-0).

Gilbert will be the odd-man out on the Sabres' blue-line when they host the Sharks on Tuesday. Mattias Samuelsson will draw into the lineup in his place.

Kleven suffered the injury in the first period of Wednesday's game and has not played since. The 23-year-old Kleven is averaging 14:19 time-on-ice, recording four points (2G / 2A), 76 blocks, and 70 hits in 58 games this season.