Goalie Thomas Greiss had a .917 save percentage the past three seasons, which ranked 26th among the 64 goalies who faced at least 1,000 shots. This creates the impression that Greiss is an average goalie, but overall save percentage treats all shots equally, not taking location into account.
When considering only shots taken from up close, within the home plate area, Greiss ranked second in the NHL with an .869 save percentage, behind Andrei Vasilevskiy of the Tampa Bay Lightning (.877), based on shot-location data contained in NHL play-by-play files.
(Note: The home plate area runs from the goal posts to the faceoff dots, then up to the top of the faceoff circles and across.)