Saturday, January 31, 2015

Effective Velocity theory by Perry Husband

The same velocity pitch can appear to be faster or slower based on the location relative to the batter. A pitch thrown up-and-inside appears to be faster than the same velocity pitch located low-and-away.

In the pitcher/hitter confrontation, whoever controls time, wins.  It really is that simple.

Effective Velocity (EV) is the study of pitch speed and how location changes the reaction time by forcing the hitter to hit the ball at a contact point that is different than they were ready for. When a pitch at 90 MPH is inside or outside, the speed "Effectively" changes because the hitter has to hit the ball earlier or later as though the pitch gained or lost speed. So, in essence, the pitch location has caused the hitter to gain or lose reaction time. For every 6" inches that the ball changes laterally, there is a little less than 3MPH gained or lost. (source:

Watch the video for a description of effective velocity.

Effective Velocity Description by Perry Husband

The Essence of Velocity
by Jason Turbow, 18 Jun 2014

Effective Velocity is made up of six tenets, some of which are commonsense and already utilized by successful pitchers at the game's highest levels, others so complex that even major league coaches have difficulty grasping them. It starts with the idea that all pitches are not equal — even those that appear to be identical on the radar gun.
It hinges on response time. Husband's model is based on the arc of hitters' swings, and the understanding that bats must move farther to reach pitches on the inner part of the plate than on the outside edge. Put another way, a batter can hit an outside fastball as it crosses the plate, but to make solid contact with an inside fastball, he must reach it much sooner — up to 2 feet in front of the plate — which requires the hitter to move the bat a greater distance in less time. With this detail in mind, it makes sense to build an approach based not on a pitch's radar speed, but how quickly the man standing in the batter's box can react to it.
This is the basis for the "effective" portion of Effective Velocity.

Learn about Effective Velocity >>

Koji Uehara EV Example

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