Red Wings fan checking in on the whole Adin Hill thing and saw this post, so figured I'd clarify.
My head haha.
I believe Detroit used a similar approach when dealing with Hasek’s fragile groin. I want to say the other two goalies were Osgood and Legace.
It was Osgood and Joey MacDonald in 06/07 until MacDonald was waived and lost to the Bruins sometime shortly before the trade deadline to give them cap flexibility for trades.
It was kind of a combination of:
-Had a crowd of goalies behind Hasek and Osgood (MacDonald, Howard, Liv and MacIntyre, who they traded during camp)
-MacDonald had been promising but missed some time due to injury and was now subject to waivers and the Red Wings were worried he'd get claimed
-Hasek was old as balls, had a wonky groin in his previous season with the Wings (03-04) and missed the last 1/4 of 05-06 with the Sens after he hurt his groin in the Olympics
-Osgood was supposed to be the Wings starter the previous season but started the year with a groin injury and lost the starting job to Legace, never really got going all year, then when Legace crapped the bed in the playoffs, Osgood tweaked his groin during a morning skate when it was speculated Babcock was going to give him the net and he missed the rest of the playoffs.
-Didn't want Hasek entering any games cold if Osgood started and was either pulled or couldn't finish a game due to injury.
The way the season started, Hasek got most of the starts, with Osgood dressing as back up and MacDonald in the press box. If they had two games in two days, Osgood would start the 2nd night with MacDonald dressing as back up, and Hasek in the press box. MacDonald didn't even get a start until well into November, and that was because Osgood went down for a month or so, elevating MacDonald to #2. Shortly after Osgood went down, the Red Wings had a stretch of 8 games where 6 of them were 3 sets of back to backs. They actually stuck to their guns on protecting Hasek and recalled Stefan Liv to dress as the back up when MacDonald got his 3 starts on the 2nd of the back to backs. After the 3rd set they sent Liv back down and Hasek started every game until the next set of back to backs, where Osgood was finally healthy. With Osgood healthy, MacDonald didn't see much action for over a month so he got sent to Grand Rapids on a conditioning stint for a week and Hasek finally dressed as the back up in the first game MacDonald was gone in mid January. Osgood got banged up again, which prompted the Wings to cut MacDonalds conditioning stint short. At some point in February both Hasek and Osgood were out and MacDonald got 3 starts in 5 nights, with games 2 and 3 in a back to back where he got torched for 10GA. Once both Osgood and Hasek were healthy, the Wings placed MacDonald on waivers a couple days before the trade deadline. IIRC, it had more to do with opening up some cap/roster flexibility since they were looking to make some big moves (they ended up getting Todd Bertuzzi and Kyle Calder) at the deadline and hoped to keep MacDonald in the fold. However, the Bruins snagged him looking for someone to replace the hot pile of garbage Hannu Toivonen playing 2nd fiddle to Tim Thomas.
The next year, they still had the Hasek/Osgood combo, but didn't carry a 3rd.
It was actually the 3rd season in 10 years that the Red Wings carried 3 goalies, but the previous two probably aren't similar to the Raanta/Kuemper/Comrie situation:
-96/97: Osgood/Vernon/Hodson: Front office pretty much hated Vernon and thought he was on his way out. They were high on Kevin Hodson and didn't want to lose him on waivers.
-98/99: Osgood/Maracle/Hodson then Osgood/Ranford/Maracle: Norm Maracle out played Hodson to take the #2 spot, but Holland wouldn't trade Hodson unless he got at least a 3rd rounder. Eventually Hodson was dealt for Wendel Clark, but the Red Wings then picked up Bill Ranford and relegated Maracle to #3 on the NHL roster.
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Another explanation for Comrie could be expansion draft insurance. If Comrie plays at least 30 minutes in 23 NHL games over the next two seasons (technically speaking in regards to the ED he DOESN'T have to play the games. However, if he doesn't he'll be eligible for player elected Group VI UFA status which if elected would negate his eligibility for the ED. He loses that option if gets those 23 games and his fate would be completely in Chayka's hands as long as the following happens...) and the Yotes give him at least a $735K qualifying offer to become an RFA before the June 2021 expansion draft, he'll meet the requirement for exposing at least one goalie to Seattle. As it stands now, Arizona doesn't have a goalie that would meet the requirement, as Raanta would be a UFA, Kuemper may need protecting as he'd have a year left, Kallgren and Prosvetov will be exempt from the draft and Hill and Madsen may or may not be under contract by then and obviously they'd want to protect a decent goalie as well. Just speculating though.