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Mittelstadt recorded an assist in Tuesday's 6-3 win over the Winnipeg Jets in Game 5.
Mittelstadt registered an assist and five shots on goal in Game 4 in a 5-1 victory over the Winnipeg Jets on Sunday.
Mittelstadt earned three assists, fired three shots on goal, went plus-3 and added two PIM in Friday's 6-2 win over the Winnipeg Jets in Game 3.
Mittelstadt scored a goal on five shots and added three hits in Sunday's 7-6 loss to the Winnipeg Jets in Game 1.
Mittelstadt logged an assist, two shots on goal, two hits and two blocked shots in Sunday's 7-4 loss to the Dallas Stars.
Mittelstadt scored a power-play goal on four shots and logged a hit in Saturday's 7-4 win over the Nashville Predators.
Mittelstadt scored Colorado's first goal in Thursday's 3-2 shootout loss to the New York Rangers.
Mittelstadt notched an assist and went plus-2 in Friday's 6-1 win over the Columbus Blue Jackets.
Mittelstadt scored a goal on two shots and had one hit in Tuesday's 4-3 win over the St. Louis Blues.
Mittelstadt notched an assist and went plus-2 in Saturday's 3-2 overtime win over the Edmonton Oilers.
Mittelstadt recorded an assist in Wednesday's 4-3 overtime win over the Vancouver Canucks.
Mittelstadt scored a goal on two shots in Tuesday's 6-2 win over the Calgary Flames.
Mittelstadt recorded one shot on net, one block and one hit in Friday's 2-1 overtime win over the Minnesota Wild.
Mittelstadt was acquired by Colorado from Buffalo on Wednesday in exchange for Bowen Byram, per Elliotte Friedman of Sportsnet.
The Colorado Avalanche acquired Casey Mittelstadt from the Buffalo Sabres for Bowen Byram
Mittelstadt supplied a power-play goal and an assist in Saturday's 7-2 win over the Vegas Golden Knights.
Mittelstadt registered an assist in Wednesday's 5-3 win over the Los Angeles Kings.
Mittelstadt scored the game-winning goal and added two assists, one on the power play, in Monday's 3-0 win over the San Jose Sharks.
Mitteldstadt notched two assists in Tuesday's 5-2 loss to the Seattle Kraken.
Mittelstadt scored twice, added an assist and went plus-3 in Friday's 5-2 win over the Vegas Golden Knights.
Mittelstadt collected a goal and two assists in a 5-1 victory over the New York Rangers on Monday.
Mittelstadt recorded an assist in Friday's 5-1 loss to the Philadelphia Flyers.
Mittelstadt tallied a goal and an assist in Wednesday's 5-2 win over the Philadelphia Flyers.
Mittelstadt picked two apples Saturday in a 3-1 win over the New York Islanders.
Mittelstadt collected a goal and an assist in Buffalo's 3-2 loss to the New York Islanders on Saturday.
Mittelstadt (upper body) is expected to play in Thursday's season opener versus the New York Rangers, Lance Lysowski of The Buffalo News reports.
Mittelstadt (upper body) is consider day-to-day after sitting out practice Tuesday, according to Heather Engel of NHL.com.
Mittelstadt tallied a goal and recorded an assist in Buffalo's 5-2 win over the Columbus Blue Jackets on Friday.
Mittelstadt scored the game-winning goal and added an assist in Thursday's 4-3 overtime win over the Ottawa Senators.
Mittelstadt scored his 13th goal of the season in Monday's 3-2 shootout win over the New York Rangers.
Mittelstadt scored two goals in Saturday's 4-3 win over the Carolina Hurricanes.
Mittelstadt delivered three assists Saturday in a 6-3 win over the Philadelphia Flyers.
Mittelstadt notched two assists in Friday's 3-2 overtime win over the New York Rangers.
Mittelstadt picked up two power-play assists in Friday's 5-2 loss to the Philadelphia Flyers.
Mittelstadt supplied the only offense for Buffalo in Thursday's 7-1 loss to the Boston Bruins with a goal in the third period.
Mittelstadt picked up two assists in Sunday's 7-4 win over the Washington Capitals.
Mittelstadt produced an assist in Monday's 3-2 overtime win over the Dallas Stars.
Mittelstadt logged a power-play assist and two shots on goal in Saturday's 5-3 win over the Nashville Predators.
Mittelstadt delivered three assists in a 6-5 overtime win over the Minnesota Wild on Saturday.
Mittelstadt was credited with two assists during a 6-3 win over the visiting Red Wings on Thursday.
Mittelstadt produced an assist and three shots on goal in Thursday's 4-2 win over the Colorado Avalanche.
Mittelstadt recorded three assists, one on the power play, in Friday's 4-3 overtime loss to the Pittsburgh Penguins.
Mittelstadt scored a power-play goal Saturday in a 5-3 loss to Tampa Bay.
Mittelstadt recorded a power-play assist, two shots on goal and a minus-2 rating in Monday's 8-3 win over the Detroit Red Wings.
Mittelstadt registered two assists in Saturday's 5-1 win over the Vancouver Canucks.
Mittelstadt scored a shorthanded goal on three shots, added a power-play assist and logged two hits in Thursday's 6-3 win over the Calgary Flames.
Mittelstadt put up an assist in Tuesday's 4-2 win over the Edmonton Oilers.
Mittelstadt notched two power-play assists in Sunday's 5-3 loss to the Florida Panthers.
Mittelstadt posted an assist and three shots on goal in Monday's 6-5 win over the Chicago Blackhawks.
Mittelstadt picked up two assists, one on the power play, in Sunday's 5-4 overtime loss to the New York Rangers.
Mittelstadt scored a goal on three shots, dished an assist and blocked two shots in Sunday's 3-2 overtime win over the Vancouver Canucks.
Mittelstadt scored a goal and an assist, both on the power play, in Friday's 5-4 win over the Minnesota Wild.
Mittelstadt (upper body) will return to the lineup Saturday versus the Colorado Avalanche, John Vogl of The Athletic reports.
Mittelstadt (upper body) will not play against the Ottawa Senators on Thursday, Bill Hoppe of the Olean Times Herald reports.
Mittelstadt (upper body) is a game-time call for Thursday's contest against the Ottawa Senators, Mike Harrington of The Buffalo News reports.
Mittelstadt (upper body) is slated to miss out versus the Ottawa Senators on Thursday. Coach Don Granato told reporters, "No chance in my mind that he'll be in tomorrow," per Paul Hamilton of WGR Sports Radio 550.
Mittelstadt (upper body) will not play in Tuesday's tilt versus the New York Islanders, Lance Lysowski of The Buffalo News.
Mittelstadt (upper body) will not participate in Sunday's contest against the Montreal Canadiens, Bill Hoppe of the Olean Times Herald reports Saturday.
Mittelstadt (upper body) was a full participant at Friday's practice, Bill Hoppe of the Olean Times Herald reports.
Mittelstadt (upper body) was ruled a week-to-week decision Tuesday.
Mittelstadt is dealing with a recurrence of the upper-body injury that required surgery back in early December and will be meeting with his surgeon, Lance Lysowski of The Buffalo News reports.
Mittelstadt (undisclosed) left Sunday's game against the Colorado Avalanche and did not return, Lance Lysowski of The Buffalo News reports.
Mittelstadt logged an assist in Saturday's 3-1 win over the Arizona Coyotes.
Mittelstadt (upper body), as expected, will be in action against the Ottawa Senators on Tuesday, John Vogl of The Athletic reports.
Mittelstadt (upper body) is likely to participate Tuesday in Ottawa, Paul Hamilton of WGR Sports Radio 550 reports Friday.
Mittelstadt (upper body) was listed as day-to-day on the Buffalo Sabres' injury report and according to coach Don Granato, the team hopes to have the center back within the next 2-3 games, Lance Lysowski of The Buffalo News reports.
Mittelstadt (upper body) had successful surgery Friday.
Mittelstadt (upper body) will be seeing a specialist Thursday regarding his injury in the hopes of giving the team a clearer picture of his recovery timeframe, Lance Lysowski of The Buffalo News reports.
Mittelstadt is set to undergo additional testing to determine if the injury he suffered during Tuesday's loss to Anaheim is the same upper-body injury that kept him sidelined for 21 games earlier this season, Mike Harrington of The Buffalo News reports.
Mittelstadt (undisclosed) was injured in Tuesday's game versus the Anaheim Ducks, Lance Lysowski of The Buffalo News reports.
Mittelstadt (upper body) was removed from injured reserve Thursday.
Mittelstadt (upper body) will be activated off injured reserve and return to the lineup for Thursday's game against the Florida Panthers, Lance Lysowski of The Buffalo News reports.
Mittelstadt (upper body) will travel with the team for its upcoming two-game road trip and could play either Thursday or Saturday against the Florida Panthers or Hurricanes, respectively, Mike Harrington of The Buffalo News reports.
Mittelstadt (upper body) was on the ice for Wednesday's game-day skate in a non-contact sweater, Mike Harrington of The Buffalo News reports.
Mittelstadt (upper body) remains without a definite timetable for his return to action, Lance Lysowski of The Buffalo News reports.
Mittelstadt (upper body) won't join the Buffalo Sabres for their upcoming four-game road trip, Paul Hamilton of WGR Sports Radio 550 reports.
Head coach Don Granato said Mittelstadt (upper body) will be out for at least a couple weeks.
Mittelstadt (upper body) won't return to Thursday's game versus the Montreal Canadiens.
Mittelstadt penned a three-year, $7.5 million contract with Buffalo on Thursday.
Mittelstadt posted an assist and two shots on goal in Thursday's 8-4 loss to the Pittsburgh Penguins.
Mittelstadt picked up two assists, one short-handed, in Saturday's 6-2 loss to the Boston Bruins.
Mittelstadt scored a goal on three shots Thursday in a 5-2 loss to Boston.
Mittelstadt produced a power-play assist and went minus-3 in Sunday's 6-3 loss to the New York Rangers.
Mittelstadt scored a short-handed goal on four shots in a 5-2 win over the Washington Capitals on Thursday.
Mittelstadt scored a power-play goal and added an assist at even strength in Tuesday's 5-3 win over the New Jersey Devils.
Mittelstadt scored a goal on his only shot in Saturday's 3-2 shootout victory over the New York Rangers.
Mittelstadt scored a goal on two shots Wednesday in a 6-1 win over the Philadelphia Flyers.
Mittelstadt was promoted to the active roster Sunday.
Mittelstadt was demoted to Buffalo's taxi squad Tuesday.
Mittelstadt was added to the active roster and will play in Thursday's game against the New Jersey Devils, per CBS Sports.
Mittelstadt was promoted from the taxi squad ahead of Monday's game versus the New York Islanders, Mike Harrington of The Buffalo News reports.
Mittelstadt has been activated off the NHL's COVID-19 protocols list, Heather Engel of NHL.com reports.
Mittelstadt was placed in the NHL's COVID-19 protocol Sunday, Lance Lysowski of The Buffalo News reports.
The Sabres added Mittelstadt to the active roster via the taxi squad Sunday.
The Sabres loaned Mittelstadt to their taxi squad Tuesday.
The Sabres promoted Mittelstadt to the active roster Sunday.
Mittelstadt has been assigned to Buffalo's taxi squad.
Mittelstadt signed a one-year, $874,125 contract with the Buffalo Sabres on Wednesday.
Assigned C Casey Mittelstadt to Rochester (AHL).
Signed C Casey Mittelstadt to a three-year, entry-level contract.