Starting Pitcher Workload & Leash

Overview

This pillar analyzes a starting pitcher's recent workload and their manager's historical tendencies to predict how long they will stay in a game. It's crucial for accurately forecasting performance in pitcher-specific prop markets.

What It Does

The analysis synthesizes a pitcher's pitch counts from their last five starts with the manager's patterns for pulling starters. It considers factors like bullpen health, game situation, and the well-known performance drop when a pitcher faces the batting order for a third time. This creates a projection for the pitcher's 'leash' in their upcoming start.

Why It Matters

It provides a significant edge by quantifying the human element of baseball strategy, which is often overlooked by standard statistical models. Knowing a manager's 'quick hook' tendency can help you predict when a pitcher will be removed, regardless of their performance, directly impacting over/under bets.

How It Works

First, we gather the pitcher's pitch counts and innings pitched over their last 3 to 5 starts to establish a baseline workload. Next, we analyze the manager's historical data to create a 'Hook Score', indicating their tendency to pull starters early. Finally, we adjust this projection based on bullpen availability and opponent strength to forecast a likely inning or pitch count limit.

Methodology

A 'Leash Score' is calculated using a weighted average of the pitcher's rolling 5-start average pitch count (50%), the manager's seasonal average innings per start compared to league average (30%), and a bullpen rest index (20%). A negative modifier of -0.5 projected innings is applied if the pitcher has a history of struggling the third time through the order.

Edge & Advantage

This pillar's edge comes from modeling a manager's specific decision-making style, a qualitative factor that most bettors guess on rather than quantify.

Key Indicators

• Rolling 5-Start Pitch Count

  high

  The average number of pitches thrown by the starter in their last five games, indicating current stamina and usage.

• Manager Hook Score

  high

  A proprietary score based on how quickly a manager pulls starters compared to the league average in similar situations.

• Bullpen Rest Status

  medium

  Measures the number of days rest for key relief pitchers; a tired bullpen often means a longer leash for the starter.

• Third-Time-Through-Order (TTO) Penalty

  medium

  The statistical decline in a pitcher's performance when facing hitters for the third time in a single game.

Data Sources

• Baseball-Reference

  Provides historical game logs, including pitch counts, innings pitched, and managerial records.

• FanGraphs

  Offers advanced pitching statistics, player splits, and in-depth game data.

• Baseball Savant

  Provides detailed pitch-by-pitch data and advanced metrics on pitcher performance.

Example Questions This Pillar Answers

• → Will Gerrit Cole pitch over or under 6.5 innings in his next start?
• → Will the starting pitcher for the Dodgers record more or less than 18.5 outs?
• → Will Logan Webb be pulled before he throws 100 pitches?

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