The save percentage thing is a little weird as far as the NHL stats go. As I've ranted about several times, for some reason the NHL decided as of this year to stop counting an own goal off a goalie's teammate as a goal against the goalie. And with no formal announcement, as far as I've seen.
The NHL is not acknowledging these goals as goals against the goalie. And Jake Allen already has two of these, so if you look on every other site, Jake Allen is credited with allowing 2 fewer goals on the NHL's official stats and a higher save percentage, while every other site is still counting these as goals against, thus a lower save percentage. For some reason the official NHL stats this year has started to recognize own goals the same way they recognize empty net goals, which don't count as a goal against on the goalie.
I do wonder if the other sites will also revise their number at season's end, and shave off goals against to match the official NHL stats on their website. Not every goalie in the league will need to be adjusted, but quite a few will. And I wonder if every other site is still going by the old way of things because of the fact that the NHL did not send the memo out to anybody that they were doing things this way as of this year.
I first noticed this when going through a box score and seeing a goalie credited with 2 goals against, despite the fact that 3 were scored on him and not seeing an empty net goal on the scoresheet. I figured it was just an error or glitch, until I started noticing it more and realizing that when someone is credited as scoring a goal that says OWN on the NHL app/website, that is no longer counted as a shot faced or goal against on a goalie.
So I'm a little surprised that the save percentage number is not slightly higher than .900% this year on the NHL's stats because it's .900% (hockey reference has .901%) on the other sites.