Player Bio
| HT/WT: 6-6, 221 lbs |
| Birthplace: Hamilton, ON |
| Age: 23 |
| Experience: 1 |
| Shoots: Left |
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1:40John Tortorella's Success With Golden Knights
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2:05Highlights: Howden's Short-handed Goal Wins it for Vegas
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1:00Who Feels The Physical Toll Of The Mammoth-Golden Knights Series First?
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1:17Golden Knights Gutsy Game 4 Win Evens Series 2-2
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1:37Breaking Down the Golden Knights' 2026 Playoff Path
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0:57Mammoth Win 1st Playoff Game, Chance To Win Series
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1:05NHL Stanley Cup Playoffs Betting Preview: Mammoth at Golden Knights
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0:20Highlights: Kings at Mammoth (12/8)
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Top Sebastian Cossa News
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Mammoth's Sebastian Cossa: Falls in overtime
Cossa stopped 30 of 35 shots in Thursday's 5-4 preseason overtime loss to the Golden Knights.
Cossa looked good at times through the first two periods, but he couldn't hold back Vegas in the third. The 23-year-old will get a chance to be an NHL regular as Karel Vejmelka's backup in 2026-27. Cossa has allowed six goals on 47 shots over two preseason outings, though it'll likely be Vejmelka between the pipes for the preseason finale Saturday versus the Avalanche.
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Mammoth's Sebastian Cossa: Expected to start Thursday
Cossa is slated to start in Thursday's preseason road game against Vegas, per Jesse Granger of The Athletic.
Cossa had a 2.33 GAA and a .915 save percentage in 39 regular-season appearances in 2025-26. This will be his second game of the 2026 preseason after he turned aside 11 of 12 shots across 40 minutes manning the net during Sunday's 4-1 loss to Colorado.
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Mammoth's Sebastian Cossa: Makes 11 saves in exhibition play
Cossa allowed one goal on 12 shots in Sunday's 4-1 preseason loss in Colorado.
Cossa played the first 40 minutes of Sunday's game before being replaced by Michael Hrabal in the final stanza. Utah gave up a first-round pick to get Cossa on the night of the 2026 NHL Draft, so he will likely be given every opportunity to earn the backup role behind Karel Vejmelka this season.
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Mammoth's Sebastian Cossa: Guarding goal Sunday
Cossa will defend the road net in Sunday's preseason matchup against Colorado, Brogan Houston of the Deseret News reports.
Cossa posted a 26-8-4 record with a 2.33 GAA and a .915 save percentage in 39 regular-season games for AHL Grand Rapids in 2025-26. He is competing for Utah's backup role behind Karel Vejmelka during training camp.
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Mammoth's Sebastian Cossa: Secures two-year deal
Cossa inked a two-year, $4 million contract with the Mammoth on Tuesday, per PuckPedia.
Cossa was dealt from Detroit to Utah during Friday's draft in exchange for the 2026 No. 23 overall pick. The 23-year-old netminder was a first-round selection in 2021, so he should have every opportunity to be the backup to Karel Vejmelka for at least the next two seasons. However, Cossa has just one game of NHL experience, so he will likely have to earn that role during training camp in September.
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Mammoth's Sebastian Cossa: Shipped to Utah via trade
Cossa was dealt to Utah from Detroit on Friday in exchange for the No. 23 overall pick in the 2026 NHL Draft, per Elliotte Friedman of Sportsnet.
Originally the No. 15 overall pick by the Red Wings in 2021, Cossa has one NHL game under his belt, with that coming back in the 2024-25 campaign. He is coming off a season with AHL Grand Rapids in which Cossa posted a 26-8-4 record along with a 2.33 GAA and .915 save percentage. Mammoth starter Karel Vejmelka appeared in an NHL-high 64 games a year ago, and Vitek Vanecek is a pending unrestricted free agent, so the 23-year-old Cossa should be considered the favorite for the backup job in Utah this coming season.
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Red Wings' Sebastian Cossa: Sent to AHL Grand Rapids
Cossa was reassigned to AHL Grand Rapids on Thursday.
Cossa was recalled Wednesday when John Gibson (upper body) was unable to play or back up Cam Talbot. It appears that Gibson should be good to go Friday against Florida, eliminating the need for Cossa. Cossa is 24-4-3 with a 1.99 GAA and a .927 save percentage across 31 AHL games this season, and his wins and GAA trail only Michael DiPietro among AHL goaltenders in 2025-26.
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Red Wings' Sebastian Cossa: Promoted from minors
Cossa was recalled from AHL Grand Rapids on Wednesday.
Cossa hasn't appeared in an NHL game yet this season, but he made a relief appearance with the Red Wings in 2024-25. The decision to bring up the 23-year-old netminder doesn't bode well for John Gibson's (upper body) availability against the Golden Knights on Wednesday -- though Gibson likely would have been serving in a backup role anyway. Look for Cossa to serve as the No. 2 option versus Vegas behind Cam Talbot.
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Red Wings' Sebastian Cossa: Notches fifth shutout
Cossa posted a 26-save shutout in AHL Grand Rapids' 5-0 win over Texas on Sunday.
Cossa improved to 21-4-2 with five shutouts, a 1.92 GAA and a .930 save percentage in 27 games this season. He went just 3-3-1 in January, but he's bounced back with three straight wins to start February. Given Cossa's improvements this season in his third AHL campaign, the 23-year-old is likely ready to compete for a full-time NHL gig in 2026-27.
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Red Wings' Sebastian Cossa: Collects fourth shutout
Cossa posted a 26-save shutout in AHL Grand Rapids' 3-0 win over Milwaukee on Saturday.
Cossa also had an assist in the contest. He's allowed two or fewer goals in eight of the 10 games during his current winnings streak. For the season, the top prospect goalie is 15-1-0 with four shutouts, a 1.57 GAA and a .940 save percentage, which has been a large reason for the Griffins' historic level of success so far.
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Red Wings' Sebastian Cossa: Logs third shutout
Cossa posted a 20-save shutout in AHL Grand Rapids' 1-0 win over Rockford on Saturday.
The Griffins' offense had a rare quiet game, but Cossa made sure that wasn't a problem. He earned his third shutout of the season in the process. Playing on a strong team has seen him post a 12-1-0 record with a 1.62 GAA and a .939 save percentage through 13 contests.
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Red Wings' Sebastian Cossa: Earns second shutout of AHL season
Cossa posted a 26-save shutout in AHL Grand Rapids' 1-0 win over Iowa on Sunday.
Cossa is up to two shutouts this season and five in his career. The 23-year-old netminder has dominated the AHL this year with an 8-1-0 record, a 1.56 GAA and a .942 save percentage in nine games. He's done everything he can at this point to earn a call-up, and continued strong play could help him push for regular NHL minutes as soon as 2026-27.
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Red Wings' Sebastian Cossa: Shuts out Manitoba
Cossa posted a 30-save shutout in AHL Grand Rapids' 4-0 win over Manitoba on Friday.
Cossa earned his first shutout of the season and the fourth of his minor-league career. He's 3-0-0 with a 1.67 GAA and a .943 save percentage over three games this season. Cossa has put up excellent numbers over the last two campaigns, but the Red Wings are taking their time with his development. Should something cause an absence for John Gibson or Cam Talbot, Cossa would likely get the call to Detroit.
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Red Wings' Sebastian Cossa: Demoted Thursday
Cossa was reassigned to AHL Grand Rapids on Thursday.
Cossa will miss out on the NHL roster, but he should be called up if John Gibson or Cam Talbot become available at any point in 2025-26. The 22-year-old Cossa will look to continue his development at the AHL level as he positions himself for a full-time NHL gig in the coming years.
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Red Wings' Sebastian Cossa: Tending twine Saturday
Cossa will defend the road net in Saturday's exhibition game against Buffalo, according to Heather Engel of NHL.com.
Cossa stopped 15 of the 17 shots he faced in Tuesday's 3-2 preseason win over Chicago. He posted a 21-15-5 record with a 2.45 GAA and a .911 save percentage across 41 regular-season appearances for AHL Grand Rapids in 2024-25. Cossa will probably return to the minors for the beginning of the 2025-26 campaign.
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Red Wings' Sebastian Cossa: Facing Blackhawks
Cossa will defend the home net in Tuesday's exhibition matchup against Chicago, Ansar Khan of MLive.com reports.
Cossa may split the contest with Michal Postava. The 22-year-old Cossa posted a 21-15-5 record with a 2.45 GAA and a .911 save percentage across 41 regular-season appearances for AHL Grand Rapids in 2024-25. He will likely spend most of the 2025-26 campaign in the minors.
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Red Wings' Sebastian Cossa: Sent back down
Cossa was reassigned to AHL Grand Rapids on Thursday.
Cossa was called up to provide goaltending depth while Cam Talbot was bothered by an undisclosed injury. Talbot was able to back up Alex Lyon and drew into Thursday's game for a relief appearance, which further proves he's healthy enough to play. Therefore, Cossa will head back to the minors, presumably to finish out the campaign with the Griffins.
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Red Wings' Sebastian Cossa: Recalled Tuesday
Cossa was recalled from AHL Grand Rapids under emergency conditions Tuesday.
Petr Mrazek (undisclosed) was hurt versus Utah on Monday, but this move suggests there may be something bothering either Cam Talbot or Alex Lyon as well. Cossa could dress for Tuesday's game versus the Avalanche. He has a 2.38 GAA and a .913 save percentage at the AHL level and also made his NHL debut Dec. 9 against the Sabres.
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Red Wings' Sebastian Cossa: Excellent in third pro season
Cossa has gone 14-9-3 with a 2.23 GAA and a .918 save percentage over 26 games with AHL Grand Rapids this season.
Cossa also made his NHL debut Dec. 10, 2024, allowing two goals on 14 shots. His AHL numbers are better in 2024-25 than they were last year -- he had a 2.41 GAA and a .913 save percentage over 40 outings in 2023-24. With all of Alex Lyon, Ville Husso and Jack Campbell coming off the books this summer, Cossa may be given a chance to claim an NHL job in the fall, though the team is likely to sign at least one other veteran goalie to keep the organizational depth steady. Cossa is not far off from being an impact player in fantasy, especially if the Red Wings continue to improve overall.
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