Strokes Gained: Approach (SG:APP)

Overview

This pillar analyzes a player's performance on approach shots, the single most predictive statistic for winning golf tournaments. It measures how many strokes a player gains or loses on the field by evaluating the quality of their shots into the green.

What It Does

Strokes Gained: Approach isolates a golfer's performance on any shot not from the tee on a Par 4 or 5, that ends up on or around the green. It compares the starting and ending location of the ball to the PGA Tour average, calculating a precise value for the quality of that single shot. This data is then aggregated over recent rounds to establish a player's current form with their irons.

Why It Matters

Approach play has the highest correlation to tournament success, far exceeding driving or putting. A player consistently gaining strokes on approach is creating more birdie opportunities and avoiding difficult recovery shots, giving them a significant statistical edge over the field.

How It Works

The model begins with the shot's starting position and the tour average strokes needed to hole out from there. After the player hits, it measures the ending position and the new average strokes to hole out. The Strokes Gained value is the starting average minus the ending average, minus the one shot taken. This process is repeated for every approach shot and averaged over a specific number of rounds.

Methodology

The core formula is SG:APP = AvgStrokes(StartPosition) - AvgStrokes(EndPosition) - 1. The analysis utilizes a rolling 24-round window, giving more weight to recent events. It specifically filters for shots outside 50 yards from the hole that are not tee shots on Par 4s or 5s.

Edge & Advantage

This pillar moves beyond simple 'Greens in Regulation' stats to quantify the true quality of a player's iron play, identifying elite ball-strikers before the market fully prices in their form.

Key Indicators

• SG:APP (Last 24 Rounds)

  high

  A player's average strokes gained on approach over their last 24 competitive rounds, indicating current form.

• Proximity from 150-175 yards

  medium

  The average distance to the hole a player leaves themselves from a key scoring range.

• Greens in Regulation %

  low

  The percentage of time a player hits the green with their approach shot; a less nuanced, traditional metric.

Data Sources

• PGA Tour ShotLink

  The official data source for every shot taken in PGA Tour events, powered by laser-positioning systems.

• DataGolf

  An advanced golf analytics platform that processes and models ShotLink data to provide predictive insights.

Example Questions This Pillar Answers

• → Who will win the 2024 Masters Tournament?
• → Will Scottie Scheffler finish in the Top 5 at the PGA Championship?
• → Which player will gain the most strokes on approach at The Open?

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