Analyzing Baseball Data with R

7Balls and Strikes Effects

Contents

1. 7.1 Introduction
2. 7.2 Hitter's Counts and Pitcher's Counts
   1. 7.2.1 Introduction
   2. 7.2.2 An example for a single pitcher
   3. 7.2.3 Pitch sequences on Retrosheet
      1. 7.2.3.1 Functions for string manipulation
      2. 7.2.3.2 Finding plate appearances going through a given count
   4. 7.2.4 Expected run value by count
   5. 7.2.5 The importance of the previous count
3. 7.3 Behaviors by Count
   1. 7.3.1 Swinging tendencies by count
      1. 7.3.1.1 Propensity to swing by location
      2. 7.3.1.2 Effect of the ball/strike count
   2. 7.3.2 Pitch selection by count
   3. 7.3.3 Umpires' behavior by count
4. 7.4 Further Reading
5. 7.5 Exercises

7.1 Introduction

In this chapter we explore the effect, of the ball/strike count on the behavior of players and umpires and on the final outcome of a plate appearance. ...