THE BATcast: A new projection system from Derek Carty, similar to THE BAT but using only Statcast data

to project players (with the exception of non-contacted-ball outcomes like strikeouts and walks, which

use THE BAT’s original projection)

BBEBatted Ball Events (essentially, the total number of balls the hitter made contact with)Barrel%

The rate of barrels, as per the official Statcast definition

“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 since Statcast was implemented Major League wide in 2015.”

Launch Angle (Average)“How high, in degrees, a ball was hit by a batter,” as per the official Statcast definition

The “(Average)” version of Launch Angle is, as the

name suggests, the average launch angle of all balls a hitter contacted and Statcast recorded data on.

The average launch angle of a hitter’s batted balls that are within the top

one-third of his hardest struck batted balls. Coined by Tom

Tango, Senior Data Architect for MLBAM: “The idea being that the harder you hit the ball, the more

likely you ‘got all of it’, and so, the launch angle was your intended launch angle. You got it on the

sweetspot of the bat, and so, the byproduct of that is your… Sweetspot Launch Angle.”

Launch Angle (-4 to 26%)The percentage of balls the batter hits with a launch angle between -4 and 26 degrees.

This range produces league average BABIPs over .300.

Launch Angle (23 to 34%)The percentage of balls the batter hits with a launch angle between 23 and 34

degrees. This range produces league average HR% over 20%.

Launch Angle (38%+)The percentage of balls the batter hits with a launch angle over 38 degrees. This

range indicates an extreme uppercut swing, which can lead to power but also kills batting average and

BABIP.

Launch Angle (Standard Deviation)The standard deviation of the launch angle of all of a hitter’s batted

balls – i.e. how tightly clustered a hitter’s launch angles are (the smaller the number, the tighter). Alex

Chamberlain originally led research into this stat

as a proxy for bat control and contact skills. It is one of the best descriptive indicators

of BABIP and a good predictive one.

Exit Velocity (Average)“How fast, in miles per hour, a ball was hit by a batter,” as per the

official Statcast definition. The “(Average)” version of Exit Velocity is, as

the name suggests, the average exit velocity of all balls a hitter contacted and Statcast recorded data on.

Exit Velocity (Max)The exit velocity of the hardest ball the player hit

Exit Velocity (Top 5%)

The average exit velocity of the top 5% of the hardest balls the player hit

Exit Velocity (Next 20%)

The average exit velocity of the top 5% through 25% of the hardest balls the

player hit (note this does not include balls in the top 5%)

Exit Velocity (Flyballs)The average exit velocity on balls labeled by MLBAM as a flyball

Exit Velocity (100+ mph In Air%)

The percentage of balls hit into the air by a batter that have an exit

velocity of 100 mph or greater

Spray ScoreCreated by Derek Carty, it is a measure of how evenly a player hits the ball to all fields (i.e.

sprays the ball). It is calculated by taking the absolute value of the percentage of balls hit to each field

(pull, center, opposite) minus .33, and adding up the values for all three fields. A hitter who hits balls

evenly to all fields (i.e. 33% to each field) will have a Spray Score of 0. A hitter who hits all balls to one

field will have a Spray Score of 1.33. The lower Spray Score is a good indicator of contact ability.

Sprint Speed“A measurement of a player's top running speed, expressed in ‘feet per second in a

player's fastest one-second window’,” as per the official Statcast definition

THE BATcastA new projection system from Derek Carty, similar to THE BAT but using only Statcast data to project players (with the exception of non-contacted-ball outcomes like strikeouts and walks, which use THE BAT’s original projection)THE BAT XA new projection system from Derek Carty. The optimal combination of THE BAT and THE BATcast, combining both traditional stats and Statcast data to form the best possible projection.__Read more about THE BAT here__

Note: Statcast stats are calculated live by in-ballpark cameras and radar. These occasionally fail to record data on certain batted balls. All data and projections displayed at EV that rely on Statcast data identify these missed balls and estimate what they should have been. Internal tests showed this to be slightly more accurate than either ignoring the missing data or using MLB's imputed data.