Using goalies to estimate zone start impact on corsi

Eric T. over at NHL Numbers had a post last week summarizing the current state of our statistical knowledge with respect to accounting for zone start differences.  If you haven’t read it definitely go read it because it is not only a good read but because it concludes that how the majority of people have been doing is is wrong. Overall, no two estimates are in direct agreement, but the analyses that are known to derive from looking directly at the outcomes immediately following a faceoff converge in the range of 0.25 to 0.4 Corsi shots per faceoff — one-third

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Zone Start effects on Goalie Save Percentage

While doing my earlier post on Luongo’s value I noticed that Luongo’s 5v5close zone start adjusted save percentage relative to the rest of the league is much more mediocre than his 5v5 save percentage.  I decide to look into this further and realized that this is in large part due to zone start effects, and not score effects.  This got me to look into zone start effects on a goalies save percentage further. I previously wrote an article where I described a simple and straight forward for adjusting for zone starts.  Basically you can fully account for zone start effects by

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