bballHR: MLB Players' Home Run and Batted Ball Statistics with Red...

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MLB Players' Home Run and Batted Ball Statistics with Red Zone Metrics (2017-2019)

Description

This dataset provides annual statistics for Major League Baseball (MLB) players, including home run counts, at-bats, mean exit velocities, launch angles, quantile statistics of exit velocities and launch angles, and red zone metrics. It is intended for analyzing batted ball performance, with additional variables on the red zone, which is defined as balls in play with a launch angle between 20 and 35 degrees and an exit velocity of at least 95 mph.

Usage

bballHR

Format

A data frame with the following columns:

name

Player's full name (character).

playerID

Player's unique identifier in the Lahman database (character).

teamID

Team abbreviation (character).

year

Season year (numeric).

HR

Home runs hit during the season (integer).

AB

At-bats during the season (integer).

mean_exit_velo

Average exit velocity (mph) over the season (numeric).

mean_launch_angle

Average launch angle (degrees) over the season (numeric).

launch_angle_75

Launch angle at the 75th percentile of the player's distribution (numeric).

launch_angle_70

Launch angle at the 70th percentile of the player's distribution (numeric).

launch_angle_65

Launch angle at the 65th percentile of the player's distribution (numeric).

exit_velo_75

Exit velocity at the 75th percentile of the player's distribution (numeric).

exit_velo_80

Exit velocity at the 80th percentile of the player's distribution (numeric).

exit_velo_85

Exit velocity at the 85th percentile of the player's distribution (numeric).

count_red_zone

Seasonal count of batted balls in the red zone, defined as a launch angle between 20 and 35 degrees and an exit velocity greater than or equal to 95 mph (integer).

prop_red_zone

Proportion of batted balls that fall into the red zone (numeric).

BPF

Ballpark factor, indicating the effect of the player's home ballpark on offensive statistics (integer).

Details

Mean Metrics

mean_exit_velo and mean_launch_angle represent the player's average exit velocities and launch angles, respectively, over the course of a season.

Quantile Metrics

The launch_angle_xx and exit_velo_xx columns denote the upper x-percentiles (e.g., 75th percentile) of the player's launch angle and exit velocity distributions for that year.

Red Zone Metrics

count_red_zone gives the number of balls in play that fall into the red zone, while prop_red_zone represents the proportion of balls in play in this category.

BPF

The Ballpark Factor (BPF) quantifies the influence of the player's home ballpark on offensive performance, with values above 100 indicating a hitter-friendly environment.

Source

• Player statistics: Lahman R Package

• Batted ball data: Baseball Savant

• Additional analysis: Patterns of Home Run Hitting in the Statcast Era by Jim Albert

Examples

data(bballHR)
head(bballHR)

assessor documentation built on April 3, 2025, 9:21 p.m.