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Note: Statcast data only collected since 2015

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Note: To generate more accurate summary data, please try to select a date range in which the selected player had at least one batted ball event in each given season

Note: Only includes qualified players for a given season (min. 475 PA)

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Note: Only includes qualified players for a given season (min. 475 PA)

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Note: Pitch location data only collected since 2008

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Note: To generate more accurate summary data, please try to select a date range in which the selected player had at least one pitch in each given season

Note: Only includes qualified players for a given season (min. 475 PA)

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Double click on a player's name in the legend to isolate layer. See table below for ordered comparisons.

Note: For ease of comparison, all metrics have been converted to a percent measurement.

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Note: All values presented as league-wide per-team averages.

The metrics used in this app include:


BA: Batting Average

SLG: Slugging Percentage

OBP: On-Base Percentage

OPS: On-Base Plus Slugging

ISO: Isolated Power

wOBA: Weighted On-Base Average

xBA: Expected Batting Average (Using Launch Angle and Exit Velocity)

xSLG: Expected Slugging Percentage (Using Launch Angle and Exit Velocity)

xISO: Expected Isolated Power (Using Launch Angle and Exit Velocity)

xwOBA: Expected Weighted On-Base Average (Using Launch Angle and Exit Velocity)

BAA: Batting Average Against

xBAA: Expected Batting Average Against (Using Launch Angle and Exit Velocity)

K %: Strikeout Rate

BB %: Walk Rate

Launch Angle: Vertical angle at which the ball leaves a player's bat after being struck

Exit Velocity: Speed at which the ball leaves a player's bat after being struck (MPH)

Estimated Distance: Projected flight path distance of batted ball (ft)

Hard Hit %: Proportion of batted balls with an exit velocity equal to or greater than 95 MPH

Sweet Spot %: Proportion of batted balls with a launch angle between 8 and 32 degrees

Barrel %: Proportion of batted-ball events whose comparable hit types (in terms of exit velocity and launch angle) have led to a minimum .500 batting average and 1.500 slugging percentage

Pitch Speed: Maximum velocity of a given pitch at any point from its release to the time it crosses home plate (MPH)

Spin Rate: Rate of spin on a given pitch after its release (RPM)

R/G: Runs Per Game

H/G: Hits Per Game

HR/G: Home Runs Per Game

SB/G: Stolen Bases Per Game

BB/G: Walks Per Game

K/G: Strikeouts Per Game

Batters/G: Unique Batters Per Game

Pitchers/G: Unique Pitchers Per Game

This app was created by Riley Leonard , Jonathan Li , and Grayson White as a final project for Math 241: Data Science at Reed College in Spring 2020. The goal of this app is to allow baseball fans to explore and visualize many of the advanced metrics recorded for Major League Baseball.

The data used for this app was primarily pulled from Statcast, and tools were used from packages such as Lahman , baseballr , pitchRx , plotly , and tidyverse . The app was last updated in Spring 2020.