Quote:
Originally Posted by DeluxeMoustache
You calling that guy old? I don’t know who he is but I assure you I have seen older
Many people on this site make this common mistake
GSAA is actually a simple stat, based solely on sv%
It doesn’t factor in shot quality or anything remotely fancy - it takes the difference between league average sv% and that of the goalie, looks at their actual shots and goals, and calculates the difference
5v5
Markstrom has -19.09 GSAA
Vladar has -4.04
All strengths
-19
-7.89
https://www.naturalstattrick.com/pla...ms.php?stdoi=g |
Goals saved above average started out as a simple save percentage differential as you point out.
But has since evolved into a xGA vs GA calculation.
And xGA very much takes into account the quality of the shot.
Quote:
To understand the concept of goals saved above expected, one must first understand what expected goals (xG) are. The calculation behind them is relatively simple. Each shot attempt is assigned a numerical value based on the percent chance the shot has of going in. This percentage is based on an abundance of factors, including but not limited to shot distance, shot angle, goalie positioning, number of defensemen present, and number of sticks in the way. Even factors like whether or not there was a cross-crease pass preceding the shot are taken into account.
That percentage is then converted to a decimal (a shot with a 20% chance of going in has an xG value of 0.2). These decimals are accumulated into a team’s or player’s xG total in a game. For example, let’s say Sidney Crosby takes three shot attempts in a game. The first has a 15% chance of going in, the second has a 32% chance, and the third has a 56% chance. Crosby’s xG total for the game would be the total of all three percentages or 1.03 xG.
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