First: It is very rare to have two strong goaltenders, an anomaly. If they were both strong that backup would be a starter somewhere.
Second: The starter in a comfortable position in the playoffs isn't given rest unless a game is clearly out of reach (blowout) and you are resting him in the latter part of the game, and even then most are left in.
I don't know of too many games where the goalie was pulled outside of leaking too many goals and injuries. It has nothing to do with endurance, it's games every other night and 2 days generally upon switching venues in the back to back home and away to start off.
Sully has brought up many times managing work loads when back-to-backs aren't a factor.
It's not just a physical endurance thing either. The season's a mental grind.
It does you no good if your healthy starting goalie is tapped out mentally come April.
What set us back last year in this regard was CDS starting slow. Sully couldn't trust him at that stage. Casey was vocal about his confidence being low.
The position is more demanding now than when Brodeur used to dominate starts. The whole league is faster. The average player shoots much harder and has more skill. Everyone's looking for lateral plays.
Look at man-games-lost for goalies last year. Staggering numbers.
We do have 2 strong goalies. Our backup is a career .915.
He was .916 during the season he got 36 games. He can handle it. Those are respectable numbers even for starters.
Jarry does not need to play 60 games next year. We can make the playoffs with him getting 50.
The East is looking to be quite weak.
Which of these teams is gonna take our spot?
If the answer is "nobody's close", then why not rest Jarry more?