verlander: Justin Verlander

Description Format Source

Description

PITCHf/x data on Justin Verlander, winner of the 2011 Cy Young Award. Covers his 2009 through 2012 seasons.

Format

A data frame with 15307 observations on the following 12 variables. Each observation is a single pitch.

season

The year of play

gamedate

Date of the game in which the pitch was thrown

pitch_type

Type of pitch thrown: CH (Change-up), CU (Curveball), FF (Four-Seam Fastball), FT (Two-Seam Fastball), SL (Slider). Pitch type is determined by computer algorithm.

balls

Current ball count

strikes

Current strike count

pitches

number of pitches previously thrown in the game

speed

speed of pitch (in mph). (When crossing plate?)

px

x-coordinate of pitch (in feet, measured from center of plate)

pz

vertical coordinate of pitch (in feet above plate)

pfx_x

the horizontal movement, in inches, of the pitch between the release point and home plate, as compared to a theoretical pitch thrown at the same speed with no spin-induced movement. Measured at 40 feet from home plate.

pfx_z

the vertical movement, in inches, of the pitch between the release point and home plate, as compared to a theoretical pitch thrown at the same speed with no spin-induced movement. Measured at 40 feet from home plate.

batter_hand

A factor with two values: L (left) and R (right).

Source

Marchi and Albert: analyzing Baseball Data with R, CRC Press 2014. For more on the PITCHf/x system, see http://en.wikipedia.org/wiki/PITCHf/x.


tigerstats documentation built on July 2, 2020, 2:32 a.m.