Sebastian Cossa finished the AHL season with a 26-8-4 record, a 2.33 goals-against average, a .915 save percentage and five shutouts before losing his starting job to Michal Postava.

Late Slump Forces Starting Job Change
Cossa posted career numbers across 38 games yet surrendered the net in the second half to Michal Postava, who took over as the primary starter for the Grand Rapids Griffins.
The 23-year-old allowed his save percentage to dip below the season mark during that stretch, directly contributing to the position change.
Detroit’s goaltending depth chart now includes Postava on the final year of his entry-level deal and 2023 second-round pick Trey Augustine, who requires substantial playing time in 2026-27.
Cossa’s single NHL appearance leaves him with minimal big-league experience entering restricted free agency.
RFA Status Triggers Waivers Requirement
As a pending restricted free agent, Cossa must be signed to an NHL contract or risk losing the rights without compensation.
Any NHL deal that does not place him as the backup forces the Red Wings to expose him to waivers before he can return to the AHL.
Three full seasons in the American Hockey League already limit further development there, making an NHL roster spot the only logical next step.
Cossa stated he will allow his agents to manage all contract discussions without personal involvement.
Competing Prospects Limit Opportunities
Trey Augustine’s arrival adds immediate pressure for ice time in Grand Rapids, reducing available minutes for Cossa if he clears waivers.
The Red Wings organization must decide whether to protect the 23-year-old on the NHL roster or risk losing him to another team on waivers.
Postava’s remaining contract year provides a temporary buffer, but Augustine’s development timeline accelerates the need for roster clarity.
Cossa’s 2.33 goals-against average and five shutouts represent the strongest statistical case for an NHL chance despite the late-season demotion.
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Par Mike Jonderson
Mike Jonderson is a passionate hockey analyst and expert in advanced NHL statistics. A former college player and mathematics graduate, he combines his understanding of the game with technical expertise to develop innovative predictive models and contribute to the evolution of modern hockey analytics.