Devan Dubnyk!
Dubnyk was slowly getting worse for years in Edmonton. Then he bounced around a bit even hitting the AHL and looked like he was out of the league.
He gets traded to a desperate Wild team and starts 38 consecutive games going 27–9–2, making the playoffs when it seemed impossible. That year Dubnyk was 3rd in Vezina voting, 4th in Hart voting, and won a Masterton! He went on to be a workhorse goalie for Minny for the next 4 years, was a 3 time all-star, and started more games than almost anyone league wide while posting great numbers.
You won't find many bigger swings than going from AHL cast off to Vezina and Hart votes after a change of scenery.
This might be the best case study of playing environments for goalies in modern day NHL.
When Dubynk was in Edmonton, he had a pretty poor defensive team in front of him. Meanwhile Minnesota had the #1 defensive environment in the NHL during Dubnyk's tenure. In fact it wasn't even close, it was silly how insulated their goalies were during this stretch.
Looking at goals saved above expected (min 30 games played).
10-11 - 13th/39 (EDM)
11-12 - 10th/42 (EDM)
12-13 - 3rd/22 (EDM)
*insert GM Craig McTavish's infamous offseason quote after being asked if Dubnyk was the Oilers starter: "If you have to ask the question, you already know the answer"*
13-14 - 38th/38 (EDM/NAS)
14-15 - 2nd (ARI/MIN)
15-16 - 27th/42 (MIN)
16-17 - 28th/41 (MIN)
17-18 - 30th/42 (MIN)
18-19 - 42nd/48 (MIN)
19-20 - 45th/45 (MIN)
He then played two more seasons on other teams with a combined 0.895SV% and was out of the league at age 35.
So what we're seeing was a goalie that was underrated in his time in Edmonton, had an awful season after getting publicly questioned by his GM and his name in trade rumours all year, followed by a season where he got hot, followed by playing below average on the best defensive team in the NHL. The reason why he was able to start so many games was because his game to game workload was less than every other starter and Minnesota practiced with a 3rd goalie.
I actually remember being on these boards during his tenure in Edmonton and the math guys were trying to explain this on HFOil, this was well before analytics were mainstreamed. Ironically when analytics started being validated, the Kevin Woodleys of the world used Dubnyk as the poster boy for a trade target
not to acquire as his numbers would drop off on a new perspective team.