Kershaw

R Documentation

Kershaw Pitch Data

Description

Pitch-by-pitch data for baseball pitcher Clayton Kershaw in the 2013 season

Format

A data frame with 3402 observations on the following 24 variables.

BatterNumber

Number of batters faced so far that game

Outcome

One of 14 possible results for a pitch (e.g. Ball, Ball In Dirt, Called Strike, ..., Swinging Strike (Blocked))

Class

One of three classifications (B=ball, S=strike, or X=in play)

Result

From pitcher's perspective (Neg=ball or hit, Pos=strike or out)

Swing

Did the batter swing at the pitch? (No or Yes)

Time

Date and time of the pitch (format yyyy-mm-ddThh:mm:ssZ)

StartSpeed

Speed leaving the pitcher's hand (in mph)

EndSpeed

Speed crossing home plate (in mph)

HDev

Horizontal movement (inches)

VDev

Vertical movement (inches)

HPos

Horizontal position at home plate (inches from center, positive is catcher's right)

VPos

Vertical position at home plate (inches above the ground)

PitchType

Code for pitch type (CH=changeup, CU=curve, FF=fastball, or SL=slider)

Zone

1-9 in theoretical strike zone (upper left to lower right), 11-14 are out of strike zone

Nasty

A measure on a 0-100 scale of difficulty of the pitch to hit (100 is most difficult)

Count

Ball strike count (0-0, 0-1, 0-2, 1-1, 1-2, 2-1, 2-2, 3-1, or 3-2)

BallCount

Number of balls before the pitch (0, 1, 2, or 3)

StrikeCount

Number of strikes before the pitch (0, 1, or 2)

Inning

Inning of the game

InningSide

Portion of the inning (bottom= pitcher at home or top=pitcher away)

Outs

Number of outs when the pitch is thrown

BatterHand

Batter's stance (L=left or R=right)

ABEvent

Result of the at bat (several possibilities)

Batter

Name of the batter faced

Details

Dataset includes information for 3,402 individual pitches thrown by Los Angeles Dodger baseball pitcher Clayton Kershaw during the 2013 regular season when he won the Cy Young award as the best pitcher in the National League. Many variables are measured using Major League Baseball's PITCHf/x system that uses camera systems in each ballpark to track characteristics of each pitch thrown.

Source

Data scraped from the MLB GameDay website (http://gd2.mlb.com/components/game/mlb/) using pitchRx