Goalie Fatigue & Rest Status

Overview

This pillar tracks how a goalie's performance is impacted by their recent schedule, specifically analyzing statistics on back-to-back games versus full rest. It provides a crucial data point for predicting game totals and team success in hockey.

What It Does

The pillar aggregates historical performance data for every NHL goalie, segmenting it by the number of rest days between starts. It focuses on key metrics like Save Percentage (SV%) and Goals Against Average (GAA) under different fatigue scenarios. The analysis contrasts a goalie's baseline performance with their expected output on short rest, providing a quantifiable fatigue factor.

Why It Matters

A tired goalie is often the single biggest liability on the ice, directly leading to more goals against. This pillar offers a predictive edge by identifying statistically likely underperformances from otherwise elite goalies, creating value in trading on overs or underdog opponents.

How It Works

First, the system identifies the confirmed starting goalie for an upcoming game using team news and insider reports. It then calculates the number of rest days since their last appearance. Finally, it compares this situation to a multi-season database of the goalie's past performances under similar rest conditions to generate a fatigue-adjusted performance projection.

Methodology

The core metric is a 'Fatigue Impact Score' (FIS), calculated by comparing a goalie's career SV% on 0 days rest versus their career SV% on 1+ days rest. The analysis uses a 3-season rolling average to weigh recent performance more heavily. Data is segmented into three rest categories: 0 Days (Back-to-Back), 1-2 Days (Standard Rest), and 3+ Days (Long Rest).

Edge & Advantage

This provides a statistical edge against public perception, which often overvalues a star goalie's reputation without properly discounting for the heavy physical toll of playing on zero days rest.

Key Indicators

• Performance on 0 Days Rest

  high

  The goalie's save percentage and goals against average when starting the second game of a back-to-back.

• Confirmed Starter Status

  high

  Official confirmation of which goalie is starting, which is essential for applying the correct analysis.

• Recent Workload

  medium

  Number of games started and total shots faced by the goalie over the last 7 days.

Data Sources

• Daily Faceoff

  Provides industry-leading confirmation of starting goalies for each game.

• Hockey-Reference

  Comprehensive historical database for individual goalie game logs and performance splits.

• Official NHL API

  Provides official game schedules and player statistics.

Example Questions This Pillar Answers

• → Will the total goals in the Rangers vs. Islanders game be over 6.5 if Igor Shesterkin is starting on no rest?
• → Will the Toronto Maple Leafs cover the -1.5 puck line against a team starting their backup goalie?
• → Will Andrei Vasilevskiy record a shutout tonight after playing last night?

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