Sebastian Cossa — Stats & Advanced Analytics
Sebastian Cossa is an NHL goaltender for the Utah Mammoth.
2026-27 So Far
Through Nov 4, Sebastian Cossa has appeared in 6 games with a 4-1-0 record and a 87.5% save percentage. He is at -3.1 goals saved above expected, 52nd of 65 goaltenders with three or more games.
Scouting Report
Sebastian Cossa is a developing netminder for the Utah Mammoth, having made his NHL debut in 2024-25. His career consists of a single game played, where he secured a win but posted a 0.857 save percentage and a -0.4 GSAx, resulting in a peak GAR of -0.3 in that season.
At 23 years old, Cossa represents a raw prospect with minimal NHL experience. His initial foray into the league suggests he is still finding his footing at the professional level and has significant development ahead.
Player Profile
| Position | Goaltender |
|---|---|
| Team | Utah Mammoth |
| Shoots / Catches | L |
| Height | 6'6" |
| Weight | 221 lb |
| Born | November 21, 2002 (age 23) in Hamilton, Canada |
| Draft | 2021 — Round 1, Pick 15 — DET |
2026-27 Season Stats
| GP | Record | SV% | GAA | GSAx | SO | GAR | WAR |
|---|---|---|---|---|---|---|---|
| 6 | 4-1-0 | 87.5% | 2.95 | -3.1 | 0 | -2.5 | -0.44 |
Among NHL goaltenders, Sebastian Cossa ranks in the 20th percentile by GAR (100th = league leader).
2026-27 Save Splits
| Even Strength | Power Play | Shorthanded | Total Saves | GA |
|---|---|---|---|---|
| 88 | 0 | 10 | 98 | 14 |
Rate & Value
| GP | W | L | OT | SV% | GAA | SO | GSAx |
|---|---|---|---|---|---|---|---|
| 6 | 4 | 1 | 0 | 87.5% | 2.95 | 0 | -3.1 |
Career by Season (Regular Season)
| Season | GP | W | L | SV% | GAA | GSAx | GAR |
|---|---|---|---|---|---|---|---|
| 2026-27 | 6 | 4 | 1 | 87.5% | 2.95 | -3.1 | -2.5 |
| 2024-25 | 1 | 1 | 0 | 85.7% | 2.67 | -0.3 | -0.2 |
Analysis
In the 2026-27 season Sebastian Cossa has been worth -2.5 Goals Above Replacement, which ranks in the 20th percentile leaguewide.
His value comes from stopping -3.1 goals above expected (GSAx) on a 87.5% save percentage.
All figures are model outputs from Hockey Alchemy. Learn how the value metrics are built on the methodology page.
Frequently Asked Questions
What is Sebastian Cossa's GAR this season?
Sebastian Cossa has been worth -2.5 Goals Above Replacement (GAR) in the 2026-27 season, in the 20th percentile of NHL players.
What is Sebastian Cossa's WAR this season?
Sebastian Cossa has been worth about -0.4 Wins Above Replacement (WAR) in the 2026-27 season, in the 20th percentile of NHL players. WAR converts GAR to wins at roughly 5.57 goals per win.
What is Sebastian Cossa's GSAx this season?
Sebastian Cossa has saved -3.1 goals above expected (GSAx) in the 2026-27 season by Hockey Alchemy's model.
What are Sebastian Cossa's goalie stats this season?
Sebastian Cossa has a 87.5% save percentage and a 2.95 goals-against average in the 2026-27 season.
Is Sebastian Cossa a good goaltender?
By Hockey Alchemy's model Sebastian Cossa grades below average this season with -2.5 GAR, in the 20th percentile among goaltenders. Goalie value is measured by goals saved above expected (GSAx).
How tall is Sebastian Cossa, and how much does he weigh?
Sebastian Cossa is 6'6" tall and weighs 221 lb. Born November 21, 2002 (age 23) in Hamilton, Canada.
How many shots has Sebastian Cossa faced in 2026-27?
Sebastian Cossa has made 98 saves on 112 shots (a 87.5% save percentage) in 2026-27.
How many of Sebastian Cossa's saves come at even strength?
88 of Sebastian Cossa's 98 saves in 2026-27 came at even strength, with the rest on special teams.