Pitch-by-pitch data for baseball pitcher Clayton Kershaw in the 2013 season
A data frame with 3402 observations on the following 24 variables.
BatterNumberNumber of batters faced so far that game
OutcomeOne of 14 possible results for a pitch (e.g. Ball, Ball In Dirt, Called Strike, ..., Swinging Strike (Blocked))
ClassOne of three classifications (B=ball, S=strike, or X=in play)
ResultFrom pitcher's perspective (Neg=ball or hit, Pos=strike or out)
SwingDid the batter swing at the pitch? (No or Yes)
TimeDate and time of the pitch (format yyyy-mm-ddThh:mm:ssZ)
StartSpeedSpeed leaving the pitcher's hand (in mph)
EndSpeedSpeed crossing home plate (in mph)
HDevHorizontal movement (inches)
VDevVertical movement (inches)
HPosHorizontal position at home plate (inches from center, positive is catcher's right)
VPosVertical position at home plate (inches above the ground)
PitchTypeCode for pitch type (CH=changeup, CU=curve, FF=fastball, or SL=slider)
Zone1-9 in theoretical strike zone (upper left to lower right), 11-14 are out of strike zone
NastyA measure on a 0-100 scale of difficulty of the pitch to hit (100 is most difficult)
CountBall strike count (0-0, 0-1, 0-2, 1-1, 1-2, 2-1, 2-2, 3-1, or 3-2)
BallCountNumber of balls before the pitch (0, 1, 2, or 3)
StrikeCountNumber of strikes before the pitch (0, 1, or 2)
InningInning of the game
InningSidePortion of the inning (bottom= pitcher at home or top=pitcher away)
OutsNumber of outs when the pitch is thrown
BatterHandBatter's stance (L=left or R=right)
ABEventResult of the at bat (several possibilities)
BatterName of the batter faced
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.