One interesting note is, how Yzerman will trust goalies, who have had early experience at pro leagues.
Ville Husso is 8 years older than Cossa.
Where was Ville Husso 8 years ago?
Playing his 2nd season as a pro for HIFK Helsinki in Finland. Top4 team of Finnish league on that time. He was second year veteran, with already 2nd season with starter amount of games 41-41-39 Liiga-games on his 1-2-3 pro season, per 60 maximum of Liiga regular season = 2/3 share.
He played these years as HIFK stater
2013-14, 19-year-old, 41 games (at this season he won U20 WJC Gold as a backup for Juuse Saros)
2014-15, 20-year-old, 41 games (at this season he was U20 WJC starter for Finland, instead of Saros, but team lost at quarterfinal)
2015-16, 21-year-old, 39 games + 10 playoff games (lost Championship final for Tappara Tampere)
Then he kind of was forgotten to St. Louis Blues farm system.
2016-17, 22-year-old, split season at AHL and ECHL, because Blues didn't have a farm team affiliate. He was worse at ECHL, than he was at AHL.
2017-18, 23-year-old, AHL season for new Blues affiliate, San Antonio Rampage. Gets called up for Team Finland backup for WHC.
2018-19, 24-year old, AHL season. (Blues Stanley Cup season)
At 2018-19, Blues were struggling at NHL side with their goaltenders (Jake Allen and Chad Johnson), and they were considering giving Husso a chance at NHL side. But, at worst possible time, Husso got hand injury, I've seen this story from a live hockey document in Finnish. They were making a video of his life at San Antonio.
-Thanks to that injury, Blues will call up Jordan Binnington instead of Husso.
Rest is history. Binnington will turn the Blues season around, will get them to playoffs after huge final push and will win 16 games as first rookie goalie ever at Stanley Cup playoffs.
Husso's hand injury will affect on him for the rest of the season, and he will have his worst career sv% season at pro level for 2018-19. Husso is struggling and others at Blues organization are celebrating the Cup.
At 2019-20 AHL season, he'll get back to form. Still waiting for his NHL chance. Blues will sign winner Binnington multi-year, who is already starting to regress from his greatest form.
Corona happens. Season sopped. 2 years will pass by without NHL-callup for Husso.
Again, at 2021, there's a new NHL-season. Husso will get his taste at NHL level, finally, as Binnington's backup. Season doesn't go well, Binnington plays better.
At 2021-22 season, Binning starts to struggle. Husso takes the starting job and will find another level. Husso plays better regular season overall than Bonnington, and both of the tandem have their ups and downs. Husso fails at the playoffs, Binnington shines again at the playoffs. Still can't beat Colorado.
Husso is UFA. Yzerman will trade for him to secure, he will sign.
At season 2022-23, he is our starter. And I think we have seen the greatest possible Husso on last game, when he did outplay Vasilevskiy. Both had superior efforts, but Husso was better. That's insane.
I started my post with a comment "how Yzerman trusts goalies with pro exprience". That was the same with Vasilevskiy. He was already at very young age at men's level at KHL. Husso was that at Liiga.
And with this ECHL thing, he definitely wants same for Cossa, for same reasons. Put the kid on a tough place, so he has to face some adversity, develop, face problems again, develop. Not get anything easy. Because at NHL nothing is easy. And you could need that 8-year exprience from lower pro-levels, like Husso, before you are ready for the starting job at NHL.