Goalie Point Shares Calculator

The formula is complex and involves several steps: 1) Calculate league and goalie save percentages, 2) Determine marginal goals saved, 3) Convert to marginal goals per game, 4) Convert to point shares based on league scoring and goalie's share of team games.

Goalie Point Shares attempts to quantify a goaltender's contribution to their team's success in terms of standings points. It compares the goalie's performance to league average, estimating how many additional goals they saved (or allowed) compared to an average goaltender. This is then converted to an estimate of points in the standings. GPS is particularly useful for comparing goaltenders across different teams and seasons.

This stat is valuable for assessing a goaltender's overall impact on their team's success. It provides a way to compare goaltenders that goes beyond traditional stats like save percentage or goals against average.

Goalie Point Shares is part of the Point Shares system developed by Justin Kubatko, gaining prominence in advanced hockey analytics in the 21st century.

GPS is part of the broader Point Shares system, which aims to divide credit for a team's success among its players. It represents an attempt to create a single number that captures a goaltender's overall value.

GPS doesn't account for the quality of shots faced, defensive support, or situational factors like power plays. It also assumes a linear relationship between goals saved and points in the standings.

If a goalie faces 1500 shots, allows 120 goals in 60 games, on a team that played 82 games, in a league averaging 3.0 goals per game, their GPS might be around 6.5 (exact value depends on the calculation).

Goaltenders like Dominik Hasek and Martin Brodeur have historically accumulated high Goalie Point Shares due to their excellent performance over many games played.